From b8c4cc6b76bde5371baee18c76146b86adb81dbb Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Mon, 23 May 2022 14:37:18 -0700
Subject: gh-93118: [Enum] fix error message (GH-93138) (GH-93142)

Include member names in error message.
(cherry picked from commit a49721ea075a18a7787ace6752b4eb0954e1b607)
---
 Lib/enum.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Lib/enum.py b/Lib/enum.py
index 43cd1bc..31923d7 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -480,8 +480,9 @@ class EnumType(type):
         # check for illegal enum names (any others?)
         invalid_names = set(member_names) & {'mro', ''}
         if invalid_names:
-            raise ValueError('invalid enum member name(s) '.format(
-                ','.join(repr(n) for n in invalid_names)))
+            raise ValueError('invalid enum member name(s) %s'  % (
+                    ','.join(repr(n) for n in invalid_names)
+                    ))
         #
         # adjust the sunders
         _order_ = classdict.pop('_order_', None)
-- 
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