Fixed tests on Windows (I hope) by forcing platform for
platform-dependent tests.
Fixed File.exists? warnings.
Improved testing infrastructure.
* test/rubygems: ditto.
* test/rdoc/test_rdoc_rubygems_hook.rb: Switch to util_spec like
RubyGems.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43651 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* test/rubygems/test_gem_installer.rb: Fixed ambiguous first argument
warning.
* test/rubygems/test_gem_rdoc.rb: RDoc generation depends on installed
version of RDoc.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38416 b2dd03c8-39d4-4d8f-98ff-823fe69b080e