diff --git a/youtube_dl/extractor/bilibili.py b/youtube_dl/extractor/bilibili.py
index d805229b3..8f47f046a 100644
--- a/youtube_dl/extractor/bilibili.py
+++ b/youtube_dl/extractor/bilibili.py
@@ -23,7 +23,7 @@ from ..utils import (
 )
 
 
-class BiliBiliIE(InfoExtractor):
+class BiliBiliIE(InfoExtractor): 
     _VALID_URL = r'https?://(?:www\.|bangumi\.|)bilibili\.(?:tv|com)/(?:video/av|anime/(?P<anime_id>\d+)/play#)(?P<id>\d+)'
 
     # url like: