typos. * test/rubygems/test_gem.rb (test_self_dir): removed false assertions. * test/rubygems/test_gem.rb (test_self_set_paths): checks if paths are included. * test/rubygems/test_gem_commands_install_command.rb (test_execute_remote): checks diagnostic message too. * test/rubygems/test_gem_installer.rb (load): uses Gem.ruby. * test/rubygems/gemutilities.rb (Gem.ruby): initializes from the environment variable to run without installation. * test/rubygems/gemutilities.rb (RubyGemTestCase#util_build_gem): creates cache directory. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21736 b2dd03c8-39d4-4d8f-98ff-823fe69b080e