* lib/rubygems: Update to RubyGems master commit 2a74263. This fixes

several bugs in RubyGems 2.2.0.preview.1.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43298 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/errors.rb

@@ -85,5 +85,10 @@ module Gem
     def wordy
       "Unable to download data from #{@source.uri} - #{@error.message}"
     end
+
+    ##
+    # The "exception" alias allows you to call raise on a SourceFetchProblem.
+
+    alias exception error
   end
 end