[3.11] Fix SyntaxWarning in test_syntax.py (GH-112944) (GH-112956)

(cherry picked from commit 97cd45bfdbb6525457ba9d6824386f1e0eea6657)

Co-authored-by: Anthony Sottile <asottile@umich.edu>

diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index 88d117f641816d6467af528a258ed143709e27dd..050d084a97aed1b58152f8f3bd74bdf74e5ec008 100644 (file)
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -2145,7 +2145,7 @@ func(
 
         # Examples with dencodings
         s = b'# coding=latin\n(aaaaaaaaaaaaaaaaa\naaaaaaaaaaa\xb5'
-        self._check_error(s, "'\(' was never closed")
+        self._check_error(s, r"'\(' was never closed")
 
     def test_error_string_literal(self):