From 3115c693b6af72f3ffae3ee5b43a314e20f74faf Mon Sep 17 00:00:00 2001
From: Antoine Martin <antoine@xpra.org>
Date: Fri, 20 Dec 2024 22:19:13 +0700
Subject: [PATCH] backport had introduced an f-string

---
 xpra/codecs/pillow/encoder.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xpra/codecs/pillow/encoder.py b/xpra/codecs/pillow/encoder.py
index 20d2006d2a..9ac1deb5d7 100644
--- a/xpra/codecs/pillow/encoder.py
+++ b/xpra/codecs/pillow/encoder.py
@@ -74,7 +74,7 @@ def encode(coding, image, quality, speed, supports_transparency):
     log("pillow.encode%s", (coding, image, quality, speed, supports_transparency))
     pixel_format = bytestostr(image.get_pixel_format())
     if coding not in ("jpeg", "webp", "png", "png/P", "png/L"):
-        raise ValueError(f"unsupported encoding: %s", coding)
+        raise ValueError("unsupported encoding: %s" % coding)
     palette = None
     w = image.get_width()
     h = image.get_height()