Thomas Arendsen Hein <thomas@intevation.de> [Wed, 06 Jun 2007 19:05:18 +0200] rev 4510
Issue a warning if "-r ." is used with two working directory parents.
Rationale for not aborting instead:
The first parent is usually more important as it is the local branch
during a merge and commands like 'hg diff' and 'hg diff -r.' behave still
identically (except for the warning of course).
Added a test for log -r. with one and two parents.