* lib/rubygems: Update to RubyGems master 3de7e0f. Changes:

Only attempt to build extensions for newly-installed gems.  This
  prevents compilation attempts at gem activation time for gems that
  already have extensions built.

  Fix crash in the dependency resolver for dependencies that cannot be
  resolved.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43368 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/util/list.rb

@@ -36,6 +36,10 @@ module Gem
       List.new value, self
     end
 
+    def pretty_print q # :nodoc:
+      q.pp to_a
+    end
+
     def self.prepend(list, value)
       return List.new(value) unless list
       List.new value, list