Add branch name to editor text.

mercurial/localrepo.py

@@ -761,6 +761,8 b' class localrepository(repo.repository):'
             edittext.append("HG: user: %s" % user)
             if p2 != nullid:
                 edittext.append("HG: branch merge")
+            if branchname:
+                edittext.append("HG: branch %s" % branchname)
             edittext.extend(["HG: changed %s" % f for f in changed])
             edittext.extend(["HG: removed %s" % f for f in removed])
             if not changed and not remove: