diff -r 346af7687c6f -r 89a2afe31e82 mercurial/parser.py
--- a/mercurial/parser.py	Fri Nov 27 17:00:00 2020 -0500
+++ b/mercurial/parser.py	Fri Nov 27 17:03:29 2020 -0500
@@ -406,8 +406,7 @@
 
 
 def parseerrordetail(inst):
-    """Compose error message from specified ParseError object
-    """
+    """Compose error message from specified ParseError object"""
     if inst.location is not None:
         return _(b'at %d: %s') % (inst.location, inst.message)
     else: