cldwalker/ripl-irb — pull request #2 by postmodern (2012-12-20 05:32:00+00:00)
Title: Added a dummy IRB module, so defined?(IRB) passes

Some code will define special global methods, only when the `IRB` module is defined. Example psych/core_ext.rb.

* https://github.com/tenderlove/psych/blob/master/lib/psych/core_ext.rb#L33