diff -r e4e2ce328599 -r e4acdf5d94a2 mercurial/extensions.py
--- a/mercurial/extensions.py	Fri Nov 26 16:55:34 2021 +0100
+++ b/mercurial/extensions.py	Mon Nov 29 13:09:04 2021 +0100
@@ -307,10 +307,12 @@
             except Exception as inst:
                 msg = stringutil.forcebytestr(inst)
                 if path:
-                    error_msg = _(b"failed to import extension %s from %s: %s")
+                    error_msg = _(
+                        b'failed to import extension "%s" from %s: %s'
+                    )
                     error_msg %= (name, path, msg)
                 else:
-                    error_msg = _(b"failed to import extension %s: %s")
+                    error_msg = _(b'failed to import extension "%s": %s')
                     error_msg %= (name, msg)
                 ui.warn((b"*** %s\n") % error_msg)
                 if isinstance(inst, error.Hint) and inst.hint: