Fix improper use of re.escape() in tests. (GH-4814) (#4816)

(cherry picked from commit b748e3b2586e44bfc7011b601bce9cc6d16d89f1)

diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index e23e5a9a6caf11841e8a6d675ff81b95d28d08c7..2b74373ffae9e4bd901e7cab1eff514ccaef2598 100644 (file)
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -112,7 +112,7 @@ class ReTests(unittest.TestCase):
 
         s = r"\1\1"
         self.assertEqual(re.sub('(.)', s, 'x'), 'xx')
-        self.assertEqual(re.sub('(.)', re.escape(s), 'x'), s)
+        self.assertEqual(re.sub('(.)', s.replace('\\', r'\\'), 'x'), s)
         self.assertEqual(re.sub('(.)', lambda m: s, 'x'), s)
 
         self.assertEqual(re.sub('(?P<a>x)', r'\g<a>\g<a>', 'xx'), 'xxxx')