mpdstats: update tests for currentsong
mpdstats: update tests for currentsong

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