Fix "invalid escape sequences" error on Python 3.6

[youtube-dl] / youtube_dl / extractor / historicfilms.py

diff --git a/youtube_dl/extractor/historicfilms.py b/youtube_dl/extractor/historicfilms.py
index 6a36933ac2c98ada87b21af4089aa158d42a3112..56343e98fb6fe33b7d714289c60db47156f48ef2 100644 (file)
--- a/youtube_dl/extractor/historicfilms.py
+++ b/youtube_dl/extractor/historicfilms.py
@@ -14,7 +14,7 @@ class HistoricFilmsIE(InfoExtractor):
             'ext': 'mov',
             'title': 'Historic Films: GP-7',
             'description': 'md5:1a86a0f3ac54024e419aba97210d959a',
-            'thumbnail': 're:^https?://.*\.jpg$',
+            'thumbnail': r're:^https?://.*\.jpg$',
             'duration': 2096,
         },
     }