Add frozen_string_literal: false for all files

When you change this to true, you may need to add more tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

161 files changed, 161 insertions, 0 deletions

diff --git a/lib/rubygems/available_set.rb b/lib/rubygems/available_set.rb
index dae254b385..da43cdf3fb 100644
--- a/lib/rubygems/available_set.rb
+++ b/lib/rubygems/available_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 class Gem::AvailableSet
 
   include Enumerable
diff --git a/lib/rubygems/basic_specification.rb b/lib/rubygems/basic_specification.rb
index 53beb43402..db962c6dcd 100644
--- a/lib/rubygems/basic_specification.rb
+++ b/lib/rubygems/basic_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # BasicSpecification is an abstract class which implements some common code
 # used by both Specification and StubSpecification.
diff --git a/lib/rubygems/command.rb b/lib/rubygems/command.rb
index 0c6abec56c..28af3d090c 100644
--- a/lib/rubygems/command.rb
+++ b/lib/rubygems/command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/command_manager.rb b/lib/rubygems/command_manager.rb
index 53d18c29cc..95e846e340 100644
--- a/lib/rubygems/command_manager.rb
+++ b/lib/rubygems/command_manager.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/commands/build_command.rb b/lib/rubygems/commands/build_command.rb
index d975429fe8..facc5226af 100644
--- a/lib/rubygems/commands/build_command.rb
+++ b/lib/rubygems/commands/build_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/package'
 
diff --git a/lib/rubygems/commands/cert_command.rb b/lib/rubygems/commands/cert_command.rb
index a920e7fcc3..073c6bd195 100644
--- a/lib/rubygems/commands/cert_command.rb
+++ b/lib/rubygems/commands/cert_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/security'
 begin
diff --git a/lib/rubygems/commands/check_command.rb b/lib/rubygems/commands/check_command.rb
index 8893b9c3b2..9d2b086951 100644
--- a/lib/rubygems/commands/check_command.rb
+++ b/lib/rubygems/commands/check_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/version_option'
 require 'rubygems/validator'
diff --git a/lib/rubygems/commands/cleanup_command.rb b/lib/rubygems/commands/cleanup_command.rb
index 69975640fe..a0bb3d576a 100644
--- a/lib/rubygems/commands/cleanup_command.rb
+++ b/lib/rubygems/commands/cleanup_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/dependency_list'
 require 'rubygems/uninstaller'
diff --git a/lib/rubygems/commands/contents_command.rb b/lib/rubygems/commands/contents_command.rb
index 4b944f18be..de756939c0 100644
--- a/lib/rubygems/commands/contents_command.rb
+++ b/lib/rubygems/commands/contents_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'English'
 require 'rubygems/command'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/commands/dependency_command.rb b/lib/rubygems/commands/dependency_command.rb
index 9d4b3e0f50..b9e33a94e0 100644
--- a/lib/rubygems/commands/dependency_command.rb
+++ b/lib/rubygems/commands/dependency_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/commands/environment_command.rb b/lib/rubygems/commands/environment_command.rb
index 79dd710bdf..47b62f03af 100644
--- a/lib/rubygems/commands/environment_command.rb
+++ b/lib/rubygems/commands/environment_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 class Gem::Commands::EnvironmentCommand < Gem::Command
diff --git a/lib/rubygems/commands/fetch_command.rb b/lib/rubygems/commands/fetch_command.rb
index c57ab0089a..3aecdc3b08 100644
--- a/lib/rubygems/commands/fetch_command.rb
+++ b/lib/rubygems/commands/fetch_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/commands/generate_index_command.rb b/lib/rubygems/commands/generate_index_command.rb
index ca6f694bc5..c0fadba64f 100644
--- a/lib/rubygems/commands/generate_index_command.rb
+++ b/lib/rubygems/commands/generate_index_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/indexer'
 
diff --git a/lib/rubygems/commands/help_command.rb b/lib/rubygems/commands/help_command.rb
index c407836467..4c176f372e 100644
--- a/lib/rubygems/commands/help_command.rb
+++ b/lib/rubygems/commands/help_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 class Gem::Commands::HelpCommand < Gem::Command
diff --git a/lib/rubygems/commands/install_command.rb b/lib/rubygems/commands/install_command.rb
index 7e3a953d19..6e243df441 100644
--- a/lib/rubygems/commands/install_command.rb
+++ b/lib/rubygems/commands/install_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/install_update_options'
 require 'rubygems/dependency_installer'
diff --git a/lib/rubygems/commands/list_command.rb b/lib/rubygems/commands/list_command.rb
index 6aa00d30b8..1f85cd3fcd 100644
--- a/lib/rubygems/commands/list_command.rb
+++ b/lib/rubygems/commands/list_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/commands/query_command'
 
diff --git a/lib/rubygems/commands/lock_command.rb b/lib/rubygems/commands/lock_command.rb
index 6b4b25a281..5a56e91933 100644
--- a/lib/rubygems/commands/lock_command.rb
+++ b/lib/rubygems/commands/lock_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 class Gem::Commands::LockCommand < Gem::Command
diff --git a/lib/rubygems/commands/mirror_command.rb b/lib/rubygems/commands/mirror_command.rb
index 24fb668d54..3816876a92 100644
--- a/lib/rubygems/commands/mirror_command.rb
+++ b/lib/rubygems/commands/mirror_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 unless defined? Gem::Commands::MirrorCommand
diff --git a/lib/rubygems/commands/open_command.rb b/lib/rubygems/commands/open_command.rb
index 254a74275e..63bff16db0 100644
--- a/lib/rubygems/commands/open_command.rb
+++ b/lib/rubygems/commands/open_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'English'
 require 'rubygems/command'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/commands/outdated_command.rb b/lib/rubygems/commands/outdated_command.rb
index 7159dbb984..f7cfc08f70 100644
--- a/lib/rubygems/commands/outdated_command.rb
+++ b/lib/rubygems/commands/outdated_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/spec_fetcher'
diff --git a/lib/rubygems/commands/owner_command.rb b/lib/rubygems/commands/owner_command.rb
index 322bf6590a..b002ff18d4 100644
--- a/lib/rubygems/commands/owner_command.rb
+++ b/lib/rubygems/commands/owner_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/gemcutter_utilities'
diff --git a/lib/rubygems/commands/pristine_command.rb b/lib/rubygems/commands/pristine_command.rb
index 5a36b12358..991272ae85 100644
--- a/lib/rubygems/commands/pristine_command.rb
+++ b/lib/rubygems/commands/pristine_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/package'
 require 'rubygems/installer'
diff --git a/lib/rubygems/commands/push_command.rb b/lib/rubygems/commands/push_command.rb
index 6899b489ad..a8e0819e82 100644
--- a/lib/rubygems/commands/push_command.rb
+++ b/lib/rubygems/commands/push_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/gemcutter_utilities'
diff --git a/lib/rubygems/commands/query_command.rb b/lib/rubygems/commands/query_command.rb
index 0d28711de8..4782eb98ef 100644
--- a/lib/rubygems/commands/query_command.rb
+++ b/lib/rubygems/commands/query_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/spec_fetcher'
diff --git a/lib/rubygems/commands/rdoc_command.rb b/lib/rubygems/commands/rdoc_command.rb
index 86597f99a6..72aa972017 100644
--- a/lib/rubygems/commands/rdoc_command.rb
+++ b/lib/rubygems/commands/rdoc_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/version_option'
 require 'rubygems/rdoc'
diff --git a/lib/rubygems/commands/search_command.rb b/lib/rubygems/commands/search_command.rb
index a1e2c1a00e..06cc997d4c 100644
--- a/lib/rubygems/commands/search_command.rb
+++ b/lib/rubygems/commands/search_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/commands/query_command'
 
diff --git a/lib/rubygems/commands/server_command.rb b/lib/rubygems/commands/server_command.rb
index 4796ce2ad6..f41bda40da 100644
--- a/lib/rubygems/commands/server_command.rb
+++ b/lib/rubygems/commands/server_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/server'
 
diff --git a/lib/rubygems/commands/setup_command.rb b/lib/rubygems/commands/setup_command.rb
index 6617396780..d3ef9ef94e 100644
--- a/lib/rubygems/commands/setup_command.rb
+++ b/lib/rubygems/commands/setup_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 ##
diff --git a/lib/rubygems/commands/sources_command.rb b/lib/rubygems/commands/sources_command.rb
index 56d7845c54..0ff5e075f5 100644
--- a/lib/rubygems/commands/sources_command.rb
+++ b/lib/rubygems/commands/sources_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/remote_fetcher'
 require 'rubygems/spec_fetcher'
diff --git a/lib/rubygems/commands/specification_command.rb b/lib/rubygems/commands/specification_command.rb
index 3bc02a9c14..4e291c6ab1 100644
--- a/lib/rubygems/commands/specification_command.rb
+++ b/lib/rubygems/commands/specification_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/commands/stale_command.rb b/lib/rubygems/commands/stale_command.rb
index 0ef0755960..6930c1cfde 100644
--- a/lib/rubygems/commands/stale_command.rb
+++ b/lib/rubygems/commands/stale_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 class Gem::Commands::StaleCommand < Gem::Command
diff --git a/lib/rubygems/commands/uninstall_command.rb b/lib/rubygems/commands/uninstall_command.rb
index 9285e57b77..52d4450bfb 100644
--- a/lib/rubygems/commands/uninstall_command.rb
+++ b/lib/rubygems/commands/uninstall_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/version_option'
 require 'rubygems/uninstaller'
diff --git a/lib/rubygems/commands/unpack_command.rb b/lib/rubygems/commands/unpack_command.rb
index 5a05ad0a81..08eaf01314 100644
--- a/lib/rubygems/commands/unpack_command.rb
+++ b/lib/rubygems/commands/unpack_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/installer'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/commands/update_command.rb b/lib/rubygems/commands/update_command.rb
index c758ce8a9d..8d76a8ce8e 100644
--- a/lib/rubygems/commands/update_command.rb
+++ b/lib/rubygems/commands/update_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/command_manager'
 require 'rubygems/dependency_installer'
diff --git a/lib/rubygems/commands/which_command.rb b/lib/rubygems/commands/which_command.rb
index 96eeb86288..c01dc18ee0 100644
--- a/lib/rubygems/commands/which_command.rb
+++ b/lib/rubygems/commands/which_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 class Gem::Commands::WhichCommand < Gem::Command
diff --git a/lib/rubygems/commands/yank_command.rb b/lib/rubygems/commands/yank_command.rb
index c05ee66283..ec99bd7df6 100644
--- a/lib/rubygems/commands/yank_command.rb
+++ b/lib/rubygems/commands/yank_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 require 'rubygems/local_remote_options'
 require 'rubygems/version_option'
diff --git a/lib/rubygems/compatibility.rb b/lib/rubygems/compatibility.rb
index 6a00a199f9..d09ddb6bf8 100644
--- a/lib/rubygems/compatibility.rb
+++ b/lib/rubygems/compatibility.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # :stopdoc:
 
 #--
diff --git a/lib/rubygems/config_file.rb b/lib/rubygems/config_file.rb
index f93917cbd4..30f26db8c9 100644
--- a/lib/rubygems/config_file.rb
+++ b/lib/rubygems/config_file.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/core_ext/kernel_gem.rb b/lib/rubygems/core_ext/kernel_gem.rb
index 61e77fe3c5..07376784e6 100644
--- a/lib/rubygems/core_ext/kernel_gem.rb
+++ b/lib/rubygems/core_ext/kernel_gem.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # RubyGems adds the #gem method to allow activation of specific gem versions
 # and overrides the #require method on Kernel to make gems appear as if they
diff --git a/lib/rubygems/core_ext/kernel_require.rb b/lib/rubygems/core_ext/kernel_require.rb
index f9b67ea5a6..196db5b6ee 100755
--- a/lib/rubygems/core_ext/kernel_require.rb
+++ b/lib/rubygems/core_ext/kernel_require.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/defaults.rb b/lib/rubygems/defaults.rb
index 55ca080c96..c1d45c19e6 100644
--- a/lib/rubygems/defaults.rb
+++ b/lib/rubygems/defaults.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem
   DEFAULT_HOST = "https://rubygems.org"
 
diff --git a/lib/rubygems/dependency.rb b/lib/rubygems/dependency.rb
index da990fa139..c0ab87d965 100644
--- a/lib/rubygems/dependency.rb
+++ b/lib/rubygems/dependency.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The Dependency class holds a Gem name and a Gem::Requirement.
 
diff --git a/lib/rubygems/dependency_installer.rb b/lib/rubygems/dependency_installer.rb
index 9741554360..954e2bf984 100644
--- a/lib/rubygems/dependency_installer.rb
+++ b/lib/rubygems/dependency_installer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/dependency_list'
 require 'rubygems/package'
diff --git a/lib/rubygems/dependency_list.rb b/lib/rubygems/dependency_list.rb
index c034bb6589..8e00dc94c8 100644
--- a/lib/rubygems/dependency_list.rb
+++ b/lib/rubygems/dependency_list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/deprecate.rb b/lib/rubygems/deprecate.rb
index e19360da13..54ab02830c 100644
--- a/lib/rubygems/deprecate.rb
+++ b/lib/rubygems/deprecate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Provides a single method +deprecate+ to be used to declare when
 # something is going away.
diff --git a/lib/rubygems/doctor.rb b/lib/rubygems/doctor.rb
index 3c71fd5aa4..15f05f63fa 100644
--- a/lib/rubygems/doctor.rb
+++ b/lib/rubygems/doctor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/user_interaction'
 
diff --git a/lib/rubygems/errors.rb b/lib/rubygems/errors.rb
index 9defb9ee9b..b22cd07706 100644
--- a/lib/rubygems/errors.rb
+++ b/lib/rubygems/errors.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # This file contains all the various exceptions and other errors that are used
 # inside of RubyGems.
diff --git a/lib/rubygems/exceptions.rb b/lib/rubygems/exceptions.rb
index 2a9875cd24..0c741a2d01 100644
--- a/lib/rubygems/exceptions.rb
+++ b/lib/rubygems/exceptions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # TODO: the documentation in here is terrible.
 #
 # Each exception needs a brief description and the scenarios where it is
diff --git a/lib/rubygems/ext.rb b/lib/rubygems/ext.rb
index 5af6bbf39e..4640b668f0 100644
--- a/lib/rubygems/ext.rb
+++ b/lib/rubygems/ext.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/ext/build_error.rb b/lib/rubygems/ext/build_error.rb
index bfe85ffc11..2098026b05 100644
--- a/lib/rubygems/ext/build_error.rb
+++ b/lib/rubygems/ext/build_error.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Raised when there is an error while building extensions.
 
diff --git a/lib/rubygems/ext/builder.rb b/lib/rubygems/ext/builder.rb
index abcc09ce57..d79b3a5901 100644
--- a/lib/rubygems/ext/builder.rb
+++ b/lib/rubygems/ext/builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/ext/cmake_builder.rb b/lib/rubygems/ext/cmake_builder.rb
index 24531bc75c..7bf431c37e 100644
--- a/lib/rubygems/ext/cmake_builder.rb
+++ b/lib/rubygems/ext/cmake_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/command'
 
 class Gem::Ext::CmakeBuilder < Gem::Ext::Builder
diff --git a/lib/rubygems/ext/configure_builder.rb b/lib/rubygems/ext/configure_builder.rb
index f66e39387a..b732cada57 100644
--- a/lib/rubygems/ext/configure_builder.rb
+++ b/lib/rubygems/ext/configure_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/ext/ext_conf_builder.rb b/lib/rubygems/ext/ext_conf_builder.rb
index f5c4c8ce84..2b50b08dc9 100644
--- a/lib/rubygems/ext/ext_conf_builder.rb
+++ b/lib/rubygems/ext/ext_conf_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/ext/rake_builder.rb b/lib/rubygems/ext/rake_builder.rb
index d5ebf597ae..279117675a 100644
--- a/lib/rubygems/ext/rake_builder.rb
+++ b/lib/rubygems/ext/rake_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/gem_runner.rb b/lib/rubygems/gem_runner.rb
index 7a3fd6b116..2bf8ac68bf 100644
--- a/lib/rubygems/gem_runner.rb
+++ b/lib/rubygems/gem_runner.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/gemcutter_utilities.rb b/lib/rubygems/gemcutter_utilities.rb
index 4ecf7376e0..98e78fe341 100644
--- a/lib/rubygems/gemcutter_utilities.rb
+++ b/lib/rubygems/gemcutter_utilities.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/remote_fetcher'
 
 ##
diff --git a/lib/rubygems/indexer.rb b/lib/rubygems/indexer.rb
index 23279f40ec..21ccf0dfbb 100644
--- a/lib/rubygems/indexer.rb
+++ b/lib/rubygems/indexer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/package'
 require 'time'
diff --git a/lib/rubygems/install_default_message.rb b/lib/rubygems/install_default_message.rb
index 458ba3da96..d20a6c71a3 100644
--- a/lib/rubygems/install_default_message.rb
+++ b/lib/rubygems/install_default_message.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/user_interaction'
 
diff --git a/lib/rubygems/install_message.rb b/lib/rubygems/install_message.rb
index c1979c1549..da68b192b1 100644
--- a/lib/rubygems/install_message.rb
+++ b/lib/rubygems/install_message.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/user_interaction'
 
diff --git a/lib/rubygems/install_update_options.rb b/lib/rubygems/install_update_options.rb
index a503b7fca4..0466583e42 100644
--- a/lib/rubygems/install_update_options.rb
+++ b/lib/rubygems/install_update_options.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
index 69590c39d8..7b4979d7ca 100644
--- a/lib/rubygems/installer.rb
+++ b/lib/rubygems/installer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/installer_test_case.rb b/lib/rubygems/installer_test_case.rb
index f4aa773114..7a1b0aa5f0 100644
--- a/lib/rubygems/installer_test_case.rb
+++ b/lib/rubygems/installer_test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/test_case'
 require 'rubygems/installer'
 
diff --git a/lib/rubygems/local_remote_options.rb b/lib/rubygems/local_remote_options.rb
index db23d9f974..8d9e209771 100644
--- a/lib/rubygems/local_remote_options.rb
+++ b/lib/rubygems/local_remote_options.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/mock_gem_ui.rb b/lib/rubygems/mock_gem_ui.rb
index 76a9389676..32e154c8b3 100644
--- a/lib/rubygems/mock_gem_ui.rb
+++ b/lib/rubygems/mock_gem_ui.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'stringio'
 require 'rubygems/user_interaction'
 
diff --git a/lib/rubygems/name_tuple.rb b/lib/rubygems/name_tuple.rb
index 60323db408..1dc7f74112 100644
--- a/lib/rubygems/name_tuple.rb
+++ b/lib/rubygems/name_tuple.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 #
 # Represents a gem of name +name+ at +version+ of +platform+. These
diff --git a/lib/rubygems/package.rb b/lib/rubygems/package.rb
index 64beae5550..6b87475c78 100644
--- a/lib/rubygems/package.rb
+++ b/lib/rubygems/package.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/digest_io.rb b/lib/rubygems/package/digest_io.rb
index f8bde0f557..47f76ec10d 100644
--- a/lib/rubygems/package/digest_io.rb
+++ b/lib/rubygems/package/digest_io.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # IO wrapper that creates digests of contents written to the IO it wraps.
 
diff --git a/lib/rubygems/package/file_source.rb b/lib/rubygems/package/file_source.rb
index 85316f62e7..4c2a7b9a4e 100644
--- a/lib/rubygems/package/file_source.rb
+++ b/lib/rubygems/package/file_source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The primary source of gems is a file on disk, including all usages
 # internal to rubygems.
diff --git a/lib/rubygems/package/io_source.rb b/lib/rubygems/package/io_source.rb
index f89593dd2d..16a6e4be8b 100644
--- a/lib/rubygems/package/io_source.rb
+++ b/lib/rubygems/package/io_source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Supports reading and writing gems from/to a generic IO object.  This is
 # useful for other applications built on top of rubygems, such as
diff --git a/lib/rubygems/package/old.rb b/lib/rubygems/package/old.rb
index bcf60a00c9..1f1f33b856 100644
--- a/lib/rubygems/package/old.rb
+++ b/lib/rubygems/package/old.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/package/source.rb b/lib/rubygems/package/source.rb
index 1f18d479da..3dcce02a67 100644
--- a/lib/rubygems/package/source.rb
+++ b/lib/rubygems/package/source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 class Gem::Package::Source # :nodoc:
 end
 
diff --git a/lib/rubygems/package/tar_header.rb b/lib/rubygems/package/tar_header.rb
index f9ab13aca7..71529ee978 100644
--- a/lib/rubygems/package/tar_header.rb
+++ b/lib/rubygems/package/tar_header.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/tar_reader.rb b/lib/rubygems/package/tar_reader.rb
index e257fdd846..a1ea81cac4 100644
--- a/lib/rubygems/package/tar_reader.rb
+++ b/lib/rubygems/package/tar_reader.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/tar_reader/entry.rb b/lib/rubygems/package/tar_reader/entry.rb
index 1d917a81ac..59d167ee8e 100644
--- a/lib/rubygems/package/tar_reader/entry.rb
+++ b/lib/rubygems/package/tar_reader/entry.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 #++
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/tar_test_case.rb b/lib/rubygems/package/tar_test_case.rb
index b2d6f4ea77..3e494e5594 100644
--- a/lib/rubygems/package/tar_test_case.rb
+++ b/lib/rubygems/package/tar_test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/test_case'
 require 'rubygems/package'
 
diff --git a/lib/rubygems/package/tar_writer.rb b/lib/rubygems/package/tar_writer.rb
index fff02e9235..6f1aab47a1 100644
--- a/lib/rubygems/package/tar_writer.rb
+++ b/lib/rubygems/package/tar_writer.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package_task.rb b/lib/rubygems/package_task.rb
index 09384cc0e7..0c525ad517 100644
--- a/lib/rubygems/package_task.rb
+++ b/lib/rubygems/package_task.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # Copyright (c) 2003, 2004 Jim Weirich, 2009 Eric Hodel
 #
 # Permission is hereby granted, free of charge, to any person obtaining
diff --git a/lib/rubygems/path_support.rb b/lib/rubygems/path_support.rb
index e68654c428..0ec29f8b60 100644
--- a/lib/rubygems/path_support.rb
+++ b/lib/rubygems/path_support.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 #
 # Gem::PathSupport facilitates the GEM_HOME and GEM_PATH environment settings
diff --git a/lib/rubygems/platform.rb b/lib/rubygems/platform.rb
index 487d245a01..cdc52cc9b3 100644
--- a/lib/rubygems/platform.rb
+++ b/lib/rubygems/platform.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "rubygems/deprecate"
 
 ##
diff --git a/lib/rubygems/psych_additions.rb b/lib/rubygems/psych_additions.rb
index 08fc04c90d..487b269903 100644
--- a/lib/rubygems/psych_additions.rb
+++ b/lib/rubygems/psych_additions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # This exists just to satisfy bugs in marshal'd gemspecs that
 # contain a reference to YAML::PrivateType. We prune these out
 # in Specification._load, but if we don't have the constant, Marshal
diff --git a/lib/rubygems/psych_tree.rb b/lib/rubygems/psych_tree.rb
index e3f1d1a08a..a5d306d769 100644
--- a/lib/rubygems/psych_tree.rb
+++ b/lib/rubygems/psych_tree.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem
   if defined? ::Psych::Visitors
     class NoAliasYAMLTree < Psych::Visitors::YAMLTree
diff --git a/lib/rubygems/rdoc.rb b/lib/rubygems/rdoc.rb
index 7591346306..e9402ede76 100644
--- a/lib/rubygems/rdoc.rb
+++ b/lib/rubygems/rdoc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/user_interaction'
 require 'fileutils'
diff --git a/lib/rubygems/remote_fetcher.rb b/lib/rubygems/remote_fetcher.rb
index 8c7ee78f84..db1eed89d4 100644
--- a/lib/rubygems/remote_fetcher.rb
+++ b/lib/rubygems/remote_fetcher.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 require 'rubygems/request'
 require 'rubygems/uri_formatter'
diff --git a/lib/rubygems/request.rb b/lib/rubygems/request.rb
index b1d041d8ea..3dfbc3d89c 100644
--- a/lib/rubygems/request.rb
+++ b/lib/rubygems/request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/http'
 require 'thread'
 require 'time'
diff --git a/lib/rubygems/request/connection_pools.rb b/lib/rubygems/request/connection_pools.rb
index 271b32b2b1..d22e357257 100644
--- a/lib/rubygems/request/connection_pools.rb
+++ b/lib/rubygems/request/connection_pools.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'thread'
 
 class Gem::Request::ConnectionPools # :nodoc:
diff --git a/lib/rubygems/request/http_pool.rb b/lib/rubygems/request/http_pool.rb
index c9a1858b98..ba3ab095bd 100644
--- a/lib/rubygems/request/http_pool.rb
+++ b/lib/rubygems/request/http_pool.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A connection "pool" that only manages one connection for now.  Provides
 # thread safe `checkout` and `checkin` methods.  The pool consists of one
diff --git a/lib/rubygems/request/https_pool.rb b/lib/rubygems/request/https_pool.rb
index 2e3da0a44e..3ab91faf61 100644
--- a/lib/rubygems/request/https_pool.rb
+++ b/lib/rubygems/request/https_pool.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 class Gem::Request::HTTPSPool < Gem::Request::HTTPPool # :nodoc:
   private
 
diff --git a/lib/rubygems/request_set.rb b/lib/rubygems/request_set.rb
index 12806836aa..b760a05d9b 100644
--- a/lib/rubygems/request_set.rb
+++ b/lib/rubygems/request_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'tsort'
 
 ##
diff --git a/lib/rubygems/request_set/gem_dependency_api.rb b/lib/rubygems/request_set/gem_dependency_api.rb
index 73813c9ac7..4927e5db6a 100644
--- a/lib/rubygems/request_set/gem_dependency_api.rb
+++ b/lib/rubygems/request_set/gem_dependency_api.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A semi-compatible DSL for the Bundler Gemfile and Isolate gem dependencies
 # files.
diff --git a/lib/rubygems/request_set/lockfile.rb b/lib/rubygems/request_set/lockfile.rb
index b79a377248..e9a706e83b 100644
--- a/lib/rubygems/request_set/lockfile.rb
+++ b/lib/rubygems/request_set/lockfile.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Parses a gem.deps.rb.lock file and constructs a LockSet containing the
 # dependencies found inside.  If the lock file is missing no LockSet is
diff --git a/lib/rubygems/request_set/lockfile/parser.rb b/lib/rubygems/request_set/lockfile/parser.rb
index f43f6457fd..18aaadf3bb 100644
--- a/lib/rubygems/request_set/lockfile/parser.rb
+++ b/lib/rubygems/request_set/lockfile/parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 class Gem::RequestSet::Lockfile::Parser
   ###
   # Parses lockfiles
diff --git a/lib/rubygems/request_set/lockfile/tokenizer.rb b/lib/rubygems/request_set/lockfile/tokenizer.rb
index 422b03c03f..d68645d235 100644
--- a/lib/rubygems/request_set/lockfile/tokenizer.rb
+++ b/lib/rubygems/request_set/lockfile/tokenizer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'strscan'
 require 'rubygems/request_set/lockfile/parser'
 
diff --git a/lib/rubygems/requirement.rb b/lib/rubygems/requirement.rb
index de16926573..a33f67dafb 100644
--- a/lib/rubygems/requirement.rb
+++ b/lib/rubygems/requirement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "rubygems/version"
 require "rubygems/deprecate"
 
diff --git a/lib/rubygems/resolver.rb b/lib/rubygems/resolver.rb
index dcd33ce10d..92dcab8e42 100644
--- a/lib/rubygems/resolver.rb
+++ b/lib/rubygems/resolver.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/dependency'
 require 'rubygems/exceptions'
 require 'rubygems/util'
diff --git a/lib/rubygems/resolver/activation_request.rb b/lib/rubygems/resolver/activation_request.rb
index 03dd8d083b..2dd540cda0 100644
--- a/lib/rubygems/resolver/activation_request.rb
+++ b/lib/rubygems/resolver/activation_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Specifies a Specification object that should be activated.  Also contains a
 # dependency that was used to introduce this activation.
diff --git a/lib/rubygems/resolver/api_set.rb b/lib/rubygems/resolver/api_set.rb
index 17d602f987..611c74ad10 100644
--- a/lib/rubygems/resolver/api_set.rb
+++ b/lib/rubygems/resolver/api_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The global rubygems pool, available via the rubygems.org API.
 # Returns instances of APISpecification.
diff --git a/lib/rubygems/resolver/api_specification.rb b/lib/rubygems/resolver/api_specification.rb
index 4960e66934..e7ba38d614 100644
--- a/lib/rubygems/resolver/api_specification.rb
+++ b/lib/rubygems/resolver/api_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Represents a specification retrieved via the rubygems.org API.
 #
diff --git a/lib/rubygems/resolver/best_set.rb b/lib/rubygems/resolver/best_set.rb
index 7e2d7e2647..c3c756c5e3 100644
--- a/lib/rubygems/resolver/best_set.rb
+++ b/lib/rubygems/resolver/best_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The BestSet chooses the best available method to query a remote index.
 #
diff --git a/lib/rubygems/resolver/composed_set.rb b/lib/rubygems/resolver/composed_set.rb
index 5b08f128ed..66d927be2a 100644
--- a/lib/rubygems/resolver/composed_set.rb
+++ b/lib/rubygems/resolver/composed_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A ComposedSet allows multiple sets to be queried like a single set.
 #
diff --git a/lib/rubygems/resolver/conflict.rb b/lib/rubygems/resolver/conflict.rb
index 0b6c704d6a..101923eb74 100644
--- a/lib/rubygems/resolver/conflict.rb
+++ b/lib/rubygems/resolver/conflict.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Used internally to indicate that a dependency conflicted
 # with a spec that would be activated.
diff --git a/lib/rubygems/resolver/current_set.rb b/lib/rubygems/resolver/current_set.rb
index 4e8d34026b..f8cec599de 100644
--- a/lib/rubygems/resolver/current_set.rb
+++ b/lib/rubygems/resolver/current_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A set which represents the installed gems. Respects
 # all the normal settings that control where to look
diff --git a/lib/rubygems/resolver/dependency_request.rb b/lib/rubygems/resolver/dependency_request.rb
index 6c6ea8f4da..ded554a85a 100644
--- a/lib/rubygems/resolver/dependency_request.rb
+++ b/lib/rubygems/resolver/dependency_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Used Internally. Wraps a Dependency object to also track which spec
 # contained the Dependency.
diff --git a/lib/rubygems/resolver/git_set.rb b/lib/rubygems/resolver/git_set.rb
index 5f1b368ac1..2b5aae64c6 100644
--- a/lib/rubygems/resolver/git_set.rb
+++ b/lib/rubygems/resolver/git_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A GitSet represents gems that are sourced from git repositories.
 #
diff --git a/lib/rubygems/resolver/git_specification.rb b/lib/rubygems/resolver/git_specification.rb
index dcfb2ad855..507f346812 100644
--- a/lib/rubygems/resolver/git_specification.rb
+++ b/lib/rubygems/resolver/git_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A GitSpecification represents a gem that is sourced from a git repository
 # and is being loaded through a gem dependencies file through the +git:+
diff --git a/lib/rubygems/resolver/index_set.rb b/lib/rubygems/resolver/index_set.rb
index 7c56c2bf99..e7cd989095 100644
--- a/lib/rubygems/resolver/index_set.rb
+++ b/lib/rubygems/resolver/index_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The global rubygems pool represented via the traditional
 # source index.
diff --git a/lib/rubygems/resolver/index_specification.rb b/lib/rubygems/resolver/index_specification.rb
index 56fecb5753..632a8a2d89 100644
--- a/lib/rubygems/resolver/index_specification.rb
+++ b/lib/rubygems/resolver/index_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Represents a possible Specification object returned from IndexSet.  Used to
 # delay needed to download full Specification objects when only the +name+
diff --git a/lib/rubygems/resolver/installed_specification.rb b/lib/rubygems/resolver/installed_specification.rb
index 2a2b89a6c2..06da6af3db 100644
--- a/lib/rubygems/resolver/installed_specification.rb
+++ b/lib/rubygems/resolver/installed_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # An InstalledSpecification represents a gem that is already installed
 # locally.
diff --git a/lib/rubygems/resolver/installer_set.rb b/lib/rubygems/resolver/installer_set.rb
index a68ff09dbd..d840b71711 100644
--- a/lib/rubygems/resolver/installer_set.rb
+++ b/lib/rubygems/resolver/installer_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A set of gems for installation sourced from remote sources and local .gem
 # files
diff --git a/lib/rubygems/resolver/local_specification.rb b/lib/rubygems/resolver/local_specification.rb
index 20a283f0ba..76192e4c0b 100644
--- a/lib/rubygems/resolver/local_specification.rb
+++ b/lib/rubygems/resolver/local_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A LocalSpecification comes from a .gem file on the local filesystem.
 
diff --git a/lib/rubygems/resolver/lock_set.rb b/lib/rubygems/resolver/lock_set.rb
index 4ede5971fb..fb581a1508 100644
--- a/lib/rubygems/resolver/lock_set.rb
+++ b/lib/rubygems/resolver/lock_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A set of gems from a gem dependencies lockfile.
 
diff --git a/lib/rubygems/resolver/lock_specification.rb b/lib/rubygems/resolver/lock_specification.rb
index 0013171469..0226878752 100644
--- a/lib/rubygems/resolver/lock_specification.rb
+++ b/lib/rubygems/resolver/lock_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The LockSpecification comes from a lockfile (Gem::RequestSet::Lockfile).
 #
diff --git a/lib/rubygems/resolver/molinillo.rb b/lib/rubygems/resolver/molinillo.rb
index 24ac0f9b2d..019536dc9b 100644
--- a/lib/rubygems/resolver/molinillo.rb
+++ b/lib/rubygems/resolver/molinillo.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
 require 'rubygems/resolver/molinillo/lib/molinillo'
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo.rb b/lib/rubygems/resolver/molinillo/lib/molinillo.rb
index 47b4518321..34dc7787dc 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/resolver/molinillo/lib/molinillo/gem_metadata'
 require 'rubygems/resolver/molinillo/lib/molinillo/errors'
 require 'rubygems/resolver/molinillo/lib/molinillo/resolver'
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph.rb
index 9780200e6f..c3a1d5a2ef 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'set'
 require 'tsort'
 
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb
index cc9f636ed5..074ee9dd7d 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Resolver::Molinillo
   # An error that occurred during the resolution process
   class ResolverError < StandardError; end
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/gem_metadata.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/gem_metadata.rb
index 73a0daa528..8140c57a58 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/gem_metadata.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/gem_metadata.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Resolver::Molinillo
   VERSION = '0.4.0'
 end
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/modules/specification_provider.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/modules/specification_provider.rb
index 848392b215..10c655ac32 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/modules/specification_provider.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/modules/specification_provider.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Resolver::Molinillo
   # Provides information about specifcations and dependencies to the resolver,
   # allowing the {Resolver} class to remain generic while still providing power
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/modules/ui.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/modules/ui.rb
index 18f5363950..100b694ebc 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/modules/ui.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/modules/ui.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Resolver::Molinillo
   # Conveys information about the resolution process to a user.
   module UI
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/resolution.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/resolution.rb
index cc572b411a..5a0eb36849 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/resolution.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/resolution.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Resolver::Molinillo
   class Resolver
     # A specific resolution from a given {Resolver}
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/resolver.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/resolver.rb
index b22caf44da..a92b3273ab 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/resolver.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/resolver.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/resolver/molinillo/lib/molinillo/dependency_graph'
 
 module Gem::Resolver::Molinillo
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/state.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/state.rb
index f0317185ab..7bc9d98927 100644
--- a/lib/rubygems/resolver/molinillo/lib/molinillo/state.rb
+++ b/lib/rubygems/resolver/molinillo/lib/molinillo/state.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Resolver::Molinillo
   # A state that a {Resolution} can be in
   # @attr [String] name
diff --git a/lib/rubygems/resolver/requirement_list.rb b/lib/rubygems/resolver/requirement_list.rb
index a6bfaab307..32f2ac5a99 100644
--- a/lib/rubygems/resolver/requirement_list.rb
+++ b/lib/rubygems/resolver/requirement_list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The RequirementList is used to hold the requirements being considered
 # while resolving a set of gems.
diff --git a/lib/rubygems/resolver/set.rb b/lib/rubygems/resolver/set.rb
index b26dc45c7b..e2253abf3a 100644
--- a/lib/rubygems/resolver/set.rb
+++ b/lib/rubygems/resolver/set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Resolver sets are used to look up specifications (and their
 # dependencies) used in resolution.  This set is abstract.
diff --git a/lib/rubygems/resolver/spec_specification.rb b/lib/rubygems/resolver/spec_specification.rb
index 1350e8a7ab..00a0533bb5 100644
--- a/lib/rubygems/resolver/spec_specification.rb
+++ b/lib/rubygems/resolver/spec_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The Resolver::SpecSpecification contains common functionality for
 # Resolver specifications that are backed by a Gem::Specification.
diff --git a/lib/rubygems/resolver/specification.rb b/lib/rubygems/resolver/specification.rb
index 9b597f1916..5833320660 100644
--- a/lib/rubygems/resolver/specification.rb
+++ b/lib/rubygems/resolver/specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A Resolver::Specification contains a subset of the information
 # contained in a Gem::Specification.  Only the information necessary for
diff --git a/lib/rubygems/resolver/stats.rb b/lib/rubygems/resolver/stats.rb
index c31e5be962..4de766f2e1 100644
--- a/lib/rubygems/resolver/stats.rb
+++ b/lib/rubygems/resolver/stats.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 class Gem::Resolver::Stats
   def initialize
     @max_depth = 0
diff --git a/lib/rubygems/resolver/vendor_set.rb b/lib/rubygems/resolver/vendor_set.rb
index 614bd05382..a006220ffe 100644
--- a/lib/rubygems/resolver/vendor_set.rb
+++ b/lib/rubygems/resolver/vendor_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A VendorSet represents gems that have been unpacked into a specific
 # directory that contains a gemspec.
diff --git a/lib/rubygems/resolver/vendor_specification.rb b/lib/rubygems/resolver/vendor_specification.rb
index a99b5f3cc1..ecf8e74def 100644
--- a/lib/rubygems/resolver/vendor_specification.rb
+++ b/lib/rubygems/resolver/vendor_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A VendorSpecification represents a gem that has been unpacked into a project
 # and is being loaded through a gem dependencies file through the +path:+
diff --git a/lib/rubygems/security.rb b/lib/rubygems/security.rb
index 8c5fb7d9f2..d44ebec9f5 100644
--- a/lib/rubygems/security.rb
+++ b/lib/rubygems/security.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/security/policies.rb b/lib/rubygems/security/policies.rb
index a976ecaf59..05c6bbdb2a 100644
--- a/lib/rubygems/security/policies.rb
+++ b/lib/rubygems/security/policies.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem::Security
 
   ##
diff --git a/lib/rubygems/security/policy.rb b/lib/rubygems/security/policy.rb
index b9bcb17525..0e13497b9d 100644
--- a/lib/rubygems/security/policy.rb
+++ b/lib/rubygems/security/policy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/user_interaction'
 
 ##
diff --git a/lib/rubygems/security/signer.rb b/lib/rubygems/security/signer.rb
index fbee240f29..a6d0161edc 100644
--- a/lib/rubygems/security/signer.rb
+++ b/lib/rubygems/security/signer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Basic OpenSSL-based package signing class.
 
diff --git a/lib/rubygems/security/trust_dir.rb b/lib/rubygems/security/trust_dir.rb
index 76ef89af7f..a032debf6e 100644
--- a/lib/rubygems/security/trust_dir.rb
+++ b/lib/rubygems/security/trust_dir.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The TrustDir manages the trusted certificates for gem signature
 # verification.
diff --git a/lib/rubygems/server.rb b/lib/rubygems/server.rb
index 7655be22ce..d83a928571 100644
--- a/lib/rubygems/server.rb
+++ b/lib/rubygems/server.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'webrick'
 require 'zlib'
 require 'erb'
diff --git a/lib/rubygems/source.rb b/lib/rubygems/source.rb
index e5995f005f..7a58a441d2 100644
--- a/lib/rubygems/source.rb
+++ b/lib/rubygems/source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'uri'
 require 'fileutils'
 
diff --git a/lib/rubygems/source/git.rb b/lib/rubygems/source/git.rb
index 35c2270a74..7096ebe617 100644
--- a/lib/rubygems/source/git.rb
+++ b/lib/rubygems/source/git.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'digest'
 require 'rubygems/util'
 
diff --git a/lib/rubygems/source/installed.rb b/lib/rubygems/source/installed.rb
index bd05c75af1..3327010768 100644
--- a/lib/rubygems/source/installed.rb
+++ b/lib/rubygems/source/installed.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Represents an installed gem.  This is used for dependency resolution.
 
diff --git a/lib/rubygems/source/local.rb b/lib/rubygems/source/local.rb
index 8057921163..a320ff1c66 100644
--- a/lib/rubygems/source/local.rb
+++ b/lib/rubygems/source/local.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The local source finds gems in the current directory for fulfilling
 # dependencies.
diff --git a/lib/rubygems/source/lock.rb b/lib/rubygems/source/lock.rb
index 2ba7702bda..98fef5a4d1 100644
--- a/lib/rubygems/source/lock.rb
+++ b/lib/rubygems/source/lock.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A Lock source wraps an installed gem's source and sorts before other sources
 # during dependency resolution.  This allows RubyGems to prefer gems from
diff --git a/lib/rubygems/source/specific_file.rb b/lib/rubygems/source/specific_file.rb
index 250a839203..790e424033 100644
--- a/lib/rubygems/source/specific_file.rb
+++ b/lib/rubygems/source/specific_file.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # A source representing a single .gem file.  This is used for installation of
 # local gems.
diff --git a/lib/rubygems/source/vendor.rb b/lib/rubygems/source/vendor.rb
index 2d936231c1..057d54ebea 100644
--- a/lib/rubygems/source/vendor.rb
+++ b/lib/rubygems/source/vendor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # This represents a vendored source that is similar to an installed gem.
 
diff --git a/lib/rubygems/source_list.rb b/lib/rubygems/source_list.rb
index e01f11cc1e..add82f2327 100644
--- a/lib/rubygems/source_list.rb
+++ b/lib/rubygems/source_list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/source'
 
 ##
diff --git a/lib/rubygems/source_local.rb b/lib/rubygems/source_local.rb
index 0808f4694a..d56b697718 100644
--- a/lib/rubygems/source_local.rb
+++ b/lib/rubygems/source_local.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/source'
 require 'rubygems/source_local'
 
diff --git a/lib/rubygems/source_specific_file.rb b/lib/rubygems/source_specific_file.rb
index f785c2667c..2ae5792781 100644
--- a/lib/rubygems/source_specific_file.rb
+++ b/lib/rubygems/source_specific_file.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/source/specific_file'
 
 # TODO warn upon require, this file is deprecated.
diff --git a/lib/rubygems/spec_fetcher.rb b/lib/rubygems/spec_fetcher.rb
index 4967c4a40b..dbeecad243 100644
--- a/lib/rubygems/spec_fetcher.rb
+++ b/lib/rubygems/spec_fetcher.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems/remote_fetcher'
 require 'rubygems/user_interaction'
 require 'rubygems/errors'
diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index 50c27aa272..ddba38da84 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/stub_specification.rb b/lib/rubygems/stub_specification.rb
index 482a75bd48..98ec7ce070 100644
--- a/lib/rubygems/stub_specification.rb
+++ b/lib/rubygems/stub_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # Gem::StubSpecification reads the stub: line from the gemspec.  This prevents
 # us having to eval the entire gemspec in order to find out certain
diff --git a/lib/rubygems/syck_hack.rb b/lib/rubygems/syck_hack.rb
index 92179abb53..0f49793ea1 100644
--- a/lib/rubygems/syck_hack.rb
+++ b/lib/rubygems/syck_hack.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # :stopdoc:
 
 # Hack to handle syck's DefaultKey bug
diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index 0e0bdfbe3e..3ffc608a1c 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # TODO: $SAFE = 1
 
 begin
diff --git a/lib/rubygems/test_utilities.rb b/lib/rubygems/test_utilities.rb
index 6789f6efc5..bb633eb3cc 100644
--- a/lib/rubygems/test_utilities.rb
+++ b/lib/rubygems/test_utilities.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'tempfile'
 require 'rubygems'
 require 'rubygems/remote_fetcher'
diff --git a/lib/rubygems/text.rb b/lib/rubygems/text.rb
index 4c033cf00e..470874621b 100644
--- a/lib/rubygems/text.rb
+++ b/lib/rubygems/text.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'rubygems'
 
 ##
diff --git a/lib/rubygems/uninstaller.rb b/lib/rubygems/uninstaller.rb
index bb3e204c8d..b54eeba585 100644
--- a/lib/rubygems/uninstaller.rb
+++ b/lib/rubygems/uninstaller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/uri_formatter.rb b/lib/rubygems/uri_formatter.rb
index 68aacc6369..bf0fc287a4 100644
--- a/lib/rubygems/uri_formatter.rb
+++ b/lib/rubygems/uri_formatter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'cgi'
 require 'uri'
 
diff --git a/lib/rubygems/user_interaction.rb b/lib/rubygems/user_interaction.rb
index 78d37906c9..69eb26df5a 100644
--- a/lib/rubygems/user_interaction.rb
+++ b/lib/rubygems/user_interaction.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/util.rb b/lib/rubygems/util.rb
index 9bfe13f815..76d8ad4bc1 100644
--- a/lib/rubygems/util.rb
+++ b/lib/rubygems/util.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # This module contains various utility methods as module methods.
 
diff --git a/lib/rubygems/util/licenses.rb b/lib/rubygems/util/licenses.rb
index a15b556c3e..08ebd925f7 100644
--- a/lib/rubygems/util/licenses.rb
+++ b/lib/rubygems/util/licenses.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 class Gem::Licenses
   NONSTANDARD = 'Nonstandard'.freeze
 
diff --git a/lib/rubygems/util/list.rb b/lib/rubygems/util/list.rb
index 6fa767646c..83dc8497c4 100644
--- a/lib/rubygems/util/list.rb
+++ b/lib/rubygems/util/list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module Gem
   class List
     include Enumerable
diff --git a/lib/rubygems/validator.rb b/lib/rubygems/validator.rb
index 6992af16ba..8a13e9911b 100644
--- a/lib/rubygems/validator.rb
+++ b/lib/rubygems/validator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
diff --git a/lib/rubygems/version.rb b/lib/rubygems/version.rb
index 16e20c5246..8e37baa348 100644
--- a/lib/rubygems/version.rb
+++ b/lib/rubygems/version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 ##
 # The Version class processes string versions into comparable
 # values. A version string should normally be a series of numbers
diff --git a/lib/rubygems/version_option.rb b/lib/rubygems/version_option.rb
index a0755d5020..a31cb14db4 100644
--- a/lib/rubygems/version_option.rb
+++ b/lib/rubygems/version_option.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.