diff -r 47fac1692ede -r 9f70512ae2cf mercurial/extensions.py
--- a/mercurial/extensions.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/extensions.py	Fri Nov 08 11:19:20 2019 -0800
@@ -834,7 +834,7 @@
                 continue
             if not isinstance(d.func, ast.Name):
                 continue
-            if d.func.id != r'command':
+            if d.func.id != 'command':
                 continue
             yield d