Kevin Bullock <kbullock@ringworld.org> [Thu, 04 Nov 2010 17:09:00 -0500] rev 12929
revsets: let parents() return parents of working dir
This patch makes the 'set' argument to revset function parents() optional.
Like p1() and p2(), if no argument is given, returns the parent(s) of the
working directory.
Morally equivalent to 'p1()+p2()', as expected.