georgi/rack_dav — pull request #19 by codeodor (2013-03-13 13:27:25+00:00)
Title: Make it obvious which parameters must be optional

It took me a while to figure out why rack_dav wasn't working with my lockable resource, so I figured making it obvious that the lock method expects to be called with as few as 2 parameters would help others avoid spending time figuring it out for themselves.