From 092573197306a72ade25bc02dc1125da011bee4e Mon Sep 17 00:00:00 2001
From: Jody Klymak <jklymak@gmail.com>
Date: Wed, 18 Sep 2019 15:09:34 -0700
Subject: [PATCH] Backport PR #15296: Fix typo/bug from 18cecf7

---
 lib/matplotlib/rcsetup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
index 31f755e4375a..25de00219dc0 100644
--- a/lib/matplotlib/rcsetup.py
+++ b/lib/matplotlib/rcsetup.py
@@ -471,7 +471,7 @@ def validate_fontweight(s):
     try:
         return int(s)
     except (ValueError, TypeError):
-        raise ValueError(f'{s} is not a valid font weight. %s')
+        raise ValueError(f'{s} is not a valid font weight.')
 
 
 def validate_font_properties(s):