Fix typo

youtube_dl/extractor/__init__.py

@@ -809,8 +809,8 @@ from .youtube import (
     YoutubeChannelIE,
     YoutubeFavouritesIE,
     # disabled because it can wipe the watch history (see #6893)
-    # remember to uncumment test in test/test_all_urls when it's fixed
-    #YoutubeHistoryIE,
+    # remember to uncomment test in test/test_all_urls when it's fixed
+    YoutubeHistoryIE,
     YoutubePlaylistIE,
     YoutubeRecommendedIE,
     YoutubeSearchDateIE,