10 files changed, 13 insertions, 13 deletions
diff --git a/ext/ripper/extconf.rb b/ext/ripper/extconf.rb
index 91d4b320e4..89b46abcfd 100644
--- a/ext/ripper/extconf.rb
+++ b/ext/ripper/extconf.rb
@@ -1,5 +1,5 @@
 #!ruby -s
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 require 'mkmf'
 require 'rbconfig'
diff --git a/ext/ripper/lib/ripper.rb b/ext/ripper/lib/ripper.rb
index c5c3a8091e..9eff2ce1ce 100644
--- a/ext/ripper/lib/ripper.rb
+++ b/ext/ripper/lib/ripper.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'ripper/core'
 require 'ripper/lexer'
 require 'ripper/filter'
diff --git a/ext/ripper/lib/ripper/core.rb b/ext/ripper/lib/ripper/core.rb
index 53ed14d5e1..cdbaf7dd34 100644
--- a/ext/ripper/lib/ripper/core.rb
+++ b/ext/ripper/lib/ripper/core.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #
 # $Id$
 #
diff --git a/ext/ripper/lib/ripper/filter.rb b/ext/ripper/lib/ripper/filter.rb
index a50a2c6c4e..455197f690 100644
--- a/ext/ripper/lib/ripper/filter.rb
+++ b/ext/ripper/lib/ripper/filter.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #
 # $Id$
 #
diff --git a/ext/ripper/lib/ripper/lexer.rb b/ext/ripper/lib/ripper/lexer.rb
index 69526340a7..669314ad92 100644
--- a/ext/ripper/lib/ripper/lexer.rb
+++ b/ext/ripper/lib/ripper/lexer.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #
 # $Id$
 #
diff --git a/ext/ripper/lib/ripper/sexp.rb b/ext/ripper/lib/ripper/sexp.rb
index aa1f86e38c..d7bf530088 100644
--- a/ext/ripper/lib/ripper/sexp.rb
+++ b/ext/ripper/lib/ripper/sexp.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #
 # $Id$
 #
diff --git a/ext/ripper/tools/generate-param-macros.rb b/ext/ripper/tools/generate-param-macros.rb
index c1f0c5bc31..f0de55a5f2 100755
--- a/ext/ripper/tools/generate-param-macros.rb
+++ b/ext/ripper/tools/generate-param-macros.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 off = true
 ARGF.each do |line|
   case line
diff --git a/ext/ripper/tools/generate.rb b/ext/ripper/tools/generate.rb
index cb02de9b4b..cf24f1398d 100755
--- a/ext/ripper/tools/generate.rb
+++ b/ext/ripper/tools/generate.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 # $Id$
 
 require 'optparse'
@@ -68,7 +68,7 @@ def usage(msg)
 end
 
 def generate_eventids1(ids)
-  buf = ""
+  buf = "".dup
   buf << %Q[static struct {\n]
   ids.each do |id, arity|
     buf << %Q[    ID id_#{id};\n]
@@ -101,7 +101,7 @@ def generate_eventids1(ids)
 end
 
 def generate_eventids2_table(ids)
-  buf = ""
+  buf = "".dup
   buf << %Q[static void\n]
   buf << %Q[ripper_init_eventids2_table(VALUE self)\n]
   buf << %Q[{\n]
diff --git a/ext/ripper/tools/preproc.rb b/ext/ripper/tools/preproc.rb
index 2377506cd5..16449ec81c 100755
--- a/ext/ripper/tools/preproc.rb
+++ b/ext/ripper/tools/preproc.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 # $Id$
 
 require 'optparse'
@@ -24,7 +24,7 @@ def main
   unless ARGV.size == 1
     abort "wrong number of arguments (#{ARGV.size} for 1)"
   end
-  out = ""
+  out = "".dup
   File.open(ARGV[0]) {|f|
     prelude f, out
     grammar f, out
diff --git a/ext/ripper/tools/strip.rb b/ext/ripper/tools/strip.rb
index 0e409eb63b..23102f797a 100755
--- a/ext/ripper/tools/strip.rb
+++ b/ext/ripper/tools/strip.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 last_is_void = false
 ARGF.each do |line|
   case line