Fix flake8 errors.
Fix flake8 errors.

vrs01/mopidy,mopidy/mopidy,mokieyue/mopidy,kingosticks/mopidy,mokieyue/mopidy,jodal/mopidy,mopidy/mopidy,ZenithDK/mopidy,vrs01/mopidy,adamcik/mopidy,adamcik/mopidy,kingosticks/mopidy,jcass77/mopidy,jcass77/mopidy,adamcik/mopidy,mokieyue/mopidy,tkem/mopidy,jcass77/mopidy,kingosticks/mopidy,mokieyue/mopidy,tkem/mopidy,ZenithDK/mopidy,vrs01/mopidy,vrs01/mopidy,ZenithDK/mopidy,ZenithDK/mopidy,jodal/mopidy,jodal/mopidy,tkem/mopidy,mopidy/mopidy,tkem/mopidy