histedit: ensure rules return short hex at all time

Handling homogeneous data is both simpler and safer.

hgext/histedit.py

@@ -724,11 +724,12 def verifyrules(rules, repo, ctxs):
         action, rest = r.split(' ', 1)
         ha = rest.strip().split(' ', 1)[0]
         try:
+            ha = str(repo[ha])  # ensure its a short hash
+        except error.RepoError:
+            raise util.Abort(_('unknown changeset %s listed') % ha)
             if repo[ha] not in ctxs:
                 raise util.Abort(
                     _('may not use changesets other than the ones listed'))
-        except error.RepoError:
-            raise util.Abort(_('unknown changeset %s listed') % ha)
         if action not in actiontable:
             raise util.Abort(_('unknown action "%s"') % action)
         parsed.append([action, ha])