Ruby

• lib/rubygems/commands/check_command.rb: Added --doctor and --dry-run
  options to clean up after failed uninstallation.
  * test/rubygems/test_gem_commands_check_command.rb: Test for above.

    * lib/rubygems/commands/push_command.rb:  Allow pushes from RubyGems
      2.0.0.preview3
  
    * lib/rubygems/commands/update_command.rb:  Use Gem.ruby_version
  
    * lib/rubygems/dependency.rb:  Update style.
  
    * lib/rubygems/installer.rb:  Ensure installed gem specifications will
      be useable.  Refactor.
    * test/rubygems/test_gem_installer.rb:  ditto.
  
    * lib/rubygems/validator.rb:  Fixed bug with unreadable files.
  
    * lib/rubygems.rb:  Fixed broken methods.
    * test/rubygems/test_gem.rb:  Test for above.
  
    * test/rubygems/test_gem_commands_push_command.rb:  Fixed overridden
      Gem.latest_rubygems_version
  

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38564 b2dd03c8-39d4-4d8f-98ff-823fe69b080e