Update rubygems 2.6.5 and 2.6.6.
  Release note of 2.6.5: https://github.com/rubygems/rubygems/commit/656f5d94dc888d78d0d00f3598a4fa37391aac80
  Release note of 2.6.6: https://github.com/rubygems/rubygems/commit/ccb9c3300c063f5b5656669972d24a10ef8afbf5

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55495 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  It supports to enable frozen string literal and add `--norc` option for
  disable to `.gemrc` configuration.
  See 2.5.2 release notes for other fixes and enhancements.
  https://github.com/rubygems/rubygems/blob/a8aa3bac723f045c52471c7b9328310a048561e0/History.txt#L3

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53707 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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

  Complete history at:
  https://github.com/rubygems/rubygems/blob/master/History.txt#L3-L216
* test/rubygems:  ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47582 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* lib/rubygems/basic_specification.rb (class Gem):
	* lib/rubygems/commands/contents_command.rb (prefix or only the files that are requir):
	* lib/rubygems/commands/install_command.rb (to write the specification by hand):
	* lib/rubygems/commands/setup_command.rb (class Gem):
	* lib/rubygems/commands/setup_command.rb (TEXT):
	* lib/rubygems/compatibility.rb (module Gem):
	* lib/rubygems/defaults.rb (module Gem):
	* lib/rubygems/deprecate.rb (module Gem):
	* lib/rubygems/installer.rb (class Gem):
	* lib/rubygems/platform.rb (class Gem):
	* lib/rubygems/rdoc.rb (class Gem):
	* lib/rubygems/request_set/lockfile.rb (class Gem):
	* lib/rubygems/resolver/installer_set.rb (class Gem):
	* lib/rubygems/resolver.rb (class Gem):
	* lib/rubygems/specification.rb (class Gem):
	* lib/rubygems/test_case.rb (class Gem):
	* lib/rubygems/test_case.rb (Also):
	* lib/rubygems/uninstaller.rb (class Gem):
	* lib/rubygems.rb (module Gem):
	* test/rubygems/test_gem.rb (class TestGem):
	* test/rubygems/test_gem_commands_contents_command.rb (lib):
	* test/rubygems/test_gem_commands_environment_command.rb (class TestGemCommandsEnvironmentCommand):
	* test/rubygems/test_gem_commands_install_command.rb (ERROR):
	* test/rubygems/test_gem_commands_update_command.rb (class TestGemCommandsUpdateCommand):
	* test/rubygems/test_gem_dependency_installer.rb (class TestGemDependencyInstaller):
	* test/rubygems/test_gem_installer.rb (load Gem):
	* test/rubygems/test_gem_installer.rb (gem):
	* test/rubygems/test_gem_request_set_lockfile.rb (GEM):
	* test/rubygems/test_gem_request_set_lockfile.rb (DEPENDENCIES):
	* test/rubygems/test_gem_specification.rb (dependencies):
	* test/rubygems/test_gem_specification.rb (duplicate dependency on b):
	* test/rubygems/test_gem_uninstaller.rb (class TestGemUninstaller):


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44515 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  repackagers to disable backward-compatible shared gem directory
  behavior.
* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44253 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  * Allow override for the shared gem installation directory for
    rubygems packagers.

  * Lock gem cache files for read and write to improve thread safety.

  * Use io/console when available.

  * Minor cleanup.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44157 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

It breaks build.
http://u64.rubyci.org/~chkbuild/ruby-trunk/log/20130913T200302Z.diff.html.gz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42941 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  Fixed installing platform gems

  Restored concurrent requires

  Fixed installing gems with extensions with --install-dir

  Fixed `gem fetch -v` to install the latest version

  Fixed installing gems with "./" in their files entries

* test/rubygems/test_gem_package.rb:  Tests for the above.

* NEWS:  Updated for RubyGems 2.1.3


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42938 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42693 b2dd03c8-39d4-4d8f-98ff-823fe69b080e