* lib/rubygems: Update to RubyGems 2.0.5.
  The patch provided by drbrain (Eric Hodel). [ruby-core:55896]
  [Backport #8617]

* test/rubygems:  Tests for the above.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42117 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 41857:

	* test/test_tracer.rb: catch up recent rubygems changes.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42118 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 41933:

	* lib/rubygems/psych_additions.rb: Ignore Psych docs here


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e