stream.hls: Fix docstring formatting.
stream.hls: Fix docstring formatting.

wlerin/streamlink,bastimeyer/streamlink,Feverqwe/livestreamer,blxd/livestreamer,charmander/livestreamer,back-to/streamlink,fishscene/streamlink,Klaudit/livestreamer,melmorabity/streamlink,Masaz-/livestreamer,hmit/livestreamer,chrippa/livestreamer,chhe/livestreamer,jtsymon/livestreamer,Klaudit/livestreamer,Saturn/livestreamer,javiercantero/streamlink,chhe/streamlink,gravyboat/streamlink,caorong/livestreamer,caorong/livestreamer,flijloku/livestreamer,derrod/livestreamer,chrippa/livestreamer,intact/livestreamer,programming086/livestreamer,chhe/streamlink,wolftankk/livestreamer,ethanhlc/streamlink,fishscene/streamlink,okaywit/livestreamer,sbstp/streamlink,ethanhlc/streamlink,wolftankk/livestreamer,Dobatymo/livestreamer,jtsymon/livestreamer,beardypig/streamlink,hmit/livestreamer,derrod/livestreamer,gtmanfred/livestreamer,Dobatymo/livestreamer,melmorabity/streamlink,sbstp/streamlink,bastimeyer/streamlink,programming086/livestreamer,intact/livestreamer,lyhiving/livestreamer,gravyboat/streamlink,beardypig/streamlink,mmetak/streamlink,okaywit/livestreamer,Saturn/livestreamer,Feverqwe/livestreamer,Masaz-/livestreamer,back-to/streamlink,chhe/livestreamer,javiercantero/streamlink,charmander/livestreamer,gtmanfred/livestreamer,flijloku/livestreamer,lyhiving/livestreamer,blxd/livestreamer,streamlink/streamlink,mmetak/streamlink,streamlink/streamlink,wlerin/streamlink