[extractor/common] Clarify when and when not we generate the filename

diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 6c5d77e583586b266d480fa4c01acf9949cfe3a7..582eb4f5be4f8889994ba0d3e7abc186c9c5547e 100644 (file)
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -238,7 +238,7 @@ class InfoExtractor(object):
             except AttributeError:
                 url = url_or_request
             if len(url) > 200:
-                h = hashlib.md5(url).hexdigest()
+                h = u'___' + hashlib.md5(url).hexdigest()
                 url = url[:200 - len(h)] + h
             raw_filename = ('%s_%s.dump' % (video_id, url))
             filename = sanitize_filename(raw_filename, restricted=True)