Adjust Mercurial execution so it works with version 1.9 and earlier.
authorW. Trevor King <wking@drexel.edu>
Thu, 8 Sep 2011 02:54:00 +0000 (22:54 -0400)
committerW. Trevor King <wking@drexel.edu>
Thu, 8 Sep 2011 02:55:40 +0000 (22:55 -0400)
commit7d207f7c040db85da48ce3930663cfa10aa88864
tree0217564b76091495ba9672e9db6f1d9cdeaf4585
parentd5e6385f6fa162a4f41219d4f523cc27446defcd
Adjust Mercurial execution so it works with version 1.9 and earlier.

This makes the changes for 1.9 brought in by
  bb645f8e489b9f50cd0aec7237ec9adb721797a8
optional.  If the Mercurial version is 1.9 or greater, the new code is
used.  Otherwise, the old code is used.
libbe/storage/vcs/hg.py