From e05cc1656cc2ed0745d22761a69edf41cdc3c41b Mon Sep 17 00:00:00 2001
From: Chris Berkhout <chrisberkhout@gmail.com>
Date: Tue, 1 Jun 2021 19:09:39 +0200
Subject: [PATCH] Fix logger to follow "No % formatting operation is performed
 on msg when no args are supplied.".

---
 src/pricehist/logger.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pricehist/logger.py b/src/pricehist/logger.py
index c4ade60..1045d74 100644
--- a/src/pricehist/logger.py
+++ b/src/pricehist/logger.py
@@ -4,7 +4,7 @@ import sys
 
 class Formatter(logging.Formatter):
     def format(self, record):
-        message = record.msg % record.args
+        message = record.msg % record.args if record.args else record.msg
         if record.levelno == logging.INFO:
             return message
         else: