--- a/mercurial/formatter.py	Wed Jul 22 21:23:46 2020 -0700
+++ b/mercurial/formatter.py	Thu Jul 23 10:20:48 2020 -0700
@@ -626,8 +626,7 @@
     a map file"""
     assert not (spec.tmpl and spec.mapfile)
     if spec.mapfile:
-        frommapfile = templater.templater.frommapfile
-        return frommapfile(
+        return templater.templater.frommapfile(
             spec.mapfile, defaults=defaults, resources=resources, cache=cache
         )
     return maketemplater(