From efb826e7da7c96229045e2e10198c99bc4ca6933 Mon Sep 17 00:00:00 2001
From: Wim Glenn <wglenn@jumptrading.com>
Date: Mon, 14 Dec 2020 19:43:39 -0600
Subject: [PATCH] fix deprecation warning about invalid escape sequence

---
 testfixtures/comparison.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/testfixtures/comparison.py b/testfixtures/comparison.py
index 181b2ef..fe136cc 100644
--- a/testfixtures/comparison.py
+++ b/testfixtures/comparison.py
@@ -305,7 +305,8 @@ def compare_set(x, y, context):
             ))
     return '\n'.join(lines)+'\n'
 
-trailing_whitespace_re = compile('\s+$', MULTILINE)
+
+trailing_whitespace_re = compile(r'\s+$', MULTILINE)
 
 
 def strip_blank_lines(text):