* lib/test/unit/assertionfailederror.rb: extend StandardError instead Exception (irb catches the former but not the latter). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3477 b2dd03c8-39d4-4d8f-98ff-823fe69b080e