* test/digest/test_digest.rb: Add more tests for digest/bubblebabble


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43753 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ext/digest/bubblebabble/bubblebabble.c: Teach RDoc digest/bubblebabble


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43754 b2dd03c8-39d4-4d8f-98ff-823fe69b080e