Correct some PEP8 post-docstring whitespace
Correct some PEP8 post-docstring whitespace

To better match #2597 for a cleaner diff.

sampsyo/beets,sampsyo/beets,pkess/beets,pkess/beets,ibmibmibm/beets,beetbox/beets,shamangeorge/beets,jackwilsdon/beets,jackwilsdon/beets,jackwilsdon/beets,jackwilsdon/beets,SusannaMaria/beets,pkess/beets,ibmibmibm/beets,ibmibmibm/beets,beetbox/beets,SusannaMaria/beets,beetbox/beets,SusannaMaria/beets,beetbox/beets,sampsyo/beets,pkess/beets,ibmibmibm/beets,sampsyo/beets,shamangeorge/beets,shamangeorge/beets,SusannaMaria/beets,shamangeorge/beets