[damned-lies] Add missing raw string prefix

[Claude Paroz <claudep src gnome org>]

commit 2752dcd802f0f9fbeffa2327f6a9d16a49a1ce8e
Author: Claude Paroz <claude 2xlibre net>
Date:   Fri Jun 19 21:06:35 2020 +0200

    Add missing raw string prefix

 damnedlies/urls.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/damnedlies/urls.py b/damnedlies/urls.py
index 6384a596..8864fff3 100644
--- a/damnedlies/urls.py
+++ b/damnedlies/urls.py
@@ -19,7 +19,7 @@ class LocaleConverter(StringConverter):
 
 class NameConverter(StringConverter):
     """Converter for module, branch, or domain names."""
-    regex = '[-~\w\+\.]+'
+    regex = r'[-~\w\+\.]+'
 
 
 register_converter(LocaleConverter, 'locale')