rubygems/rubygems — pull request #721 by ratnikov (2013-11-26 19:50:49+00:00)
Title: Fix rake extensions builder to support jruby-complete.jar case

when using jruby from jruby-complete.jar, Gem.ruby returns "java -jar /path/to/jruby-complete.jar" and since it's in quotes, the builder blows up stating that file doesn't exist.

Unfortunately, reproducing this in tests is rather clunky, which is why there's no test fix.