--- a/mercurial/registrar.py	Mon Aug 10 15:50:22 2020 +0200
+++ b/mercurial/registrar.py	Tue Sep 01 22:28:41 2020 -0400
@@ -121,7 +121,7 @@
         return self._docformat % (decl, doc)
 
     def _extrasetup(self, name, func):
-        """Execute exra setup for registered function, if needed
+        """Execute extra setup for registered function, if needed
         """