diff -r 14e374d4c9ee -r 70d42e2ad9b4 mercurial/templater.py
--- a/mercurial/templater.py	Wed Nov 06 14:12:53 2019 -0500
+++ b/mercurial/templater.py	Wed Nov 06 17:46:26 2019 -0500
@@ -611,7 +611,7 @@
     return s[1:-1]
 
 
-class resourcemapper(object):
+class resourcemapper(object):  # pytype: disable=ignored-metaclass
     """Mapper of internal template resources"""
 
     __metaclass__ = abc.ABCMeta