commit 5729b9c0e9833ec8387d1bdaef619a2e66060a28
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Sat Mar 24 20:23:00 2018 -0700
committer GitHub <noreply@github.com> Sat Mar 24 20:23:00 2018 -0700
tree e5a8d1f80df23bf60f3078f45c4e99767f32df4f
parent 9989efbb653e8cbd08e51b4d79d094605c8b23b8

Fix invalid escape sequence: use raw string. (GH-6225)

(cherry picked from commit c42e7aa67ce72a6c4c6cdfe3b0929ca07556d444)

Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>

Lib/test/test_dataclasses.py

diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index 8aff8ae..75e3cff 100755
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -2667,7 +2667,7 @@
         # There was a bug where a variable in a slot was assumed
         #  to also have a default value (of type types.MemberDescriptorType).
         with self.assertRaisesRegex(TypeError,
-                                    "__init__\(\) missing 1 required positional argument: 'x'"):
+                                    r"__init__\(\) missing 1 required positional argument: 'x'"):
             C()
 
         # We can create an instance, and assign to x.