Fix "invalid escape sequences" error on Python 3.6

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

diff --git a/youtube_dl/extractor/ard.py b/youtube_dl/extractor/ard.py
index 35f3656f11d7579a1f67cd0ac6e9c06a37c44917..2d5599456688eba9756e28c2ffe9dbae48decb2c 100644 (file)
--- a/youtube_dl/extractor/ard.py
+++ b/youtube_dl/extractor/ard.py
@@ -253,7 +253,7 @@ class ARDIE(InfoExtractor):
             'duration': 2600,
             'title': 'Die Story im Ersten: Mission unter falscher Flagge',
             'upload_date': '20140804',
-            'thumbnail': 're:^https?://.*\.jpg$',
+            'thumbnail': r're:^https?://.*\.jpg$',
         },
         'skip': 'HTTP Error 404: Not Found',
     }