[PATCH] registrar: make format strings unicodes and not bytes

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1475843538 14400
#      Fri Oct 07 08:32:18 2016 -0400
# Node ID c79b21f1d5dea9de719504be30ebdb5635263d37
# Parent  f3a2125968377fb1d4b9ea3f4917260d5aca3536
registrar: make format strings unicodes and not bytes

Fixes issues on Python 3, wherein docstrings are unicodes. Shouldn't
break anything on Python 2.

diff --git a/mercurial/registrar.py b/mercurial/registrar.py
--- a/mercurial/registrar.py
+++ b/mercurial/registrar.py
@@ -121,7 +121,7 @@ class revsetpredicate(_funcregistrarbase
     Otherwise, explicit 'revset.loadpredicate()' is needed.
     """
     _getname = _funcregistrarbase._parsefuncdecl
-    _docformat = "``%s``\n    %s"
+    _docformat = u"``%s``\n    %s"
 
     def _extrasetup(self, name, func, safe=False, takeorder=False):
         func._safe = safe
@@ -160,7 +160,7 @@ class filesetpredicate(_funcregistrarbas
     Otherwise, explicit 'fileset.loadpredicate()' is needed.
     """
     _getname = _funcregistrarbase._parsefuncdecl
-    _docformat = "``%s``\n    %s"
+    _docformat = u"``%s``\n    %s"
 
     def _extrasetup(self, name, func, callstatus=False, callexisting=False):
         func._callstatus = callstatus
@@ -169,7 +169,7 @@ class filesetpredicate(_funcregistrarbas
 class _templateregistrarbase(_funcregistrarbase):
     """Base of decorator to register functions as template specific one
     """
-    _docformat = ":%s: %s"
+    _docformat = u":%s: %s"
 
 class templatekeyword(_templateregistrarbase):
     """Decorator to register template keyword