core: flake8 fixes
core: flake8 fixes

tkem/mopidy,quartz55/mopidy,tkem/mopidy,hkariti/mopidy,jmarsik/mopidy,ali/mopidy,jmarsik/mopidy,diandiankan/mopidy,bencevans/mopidy,ZenithDK/mopidy,hkariti/mopidy,swak/mopidy,vrs01/mopidy,mokieyue/mopidy,kingosticks/mopidy,bencevans/mopidy,mopidy/mopidy,vrs01/mopidy,bencevans/mopidy,jodal/mopidy,glogiotatidis/mopidy,kingosticks/mopidy,dbrgn/mopidy,abarisain/mopidy,diandiankan/mopidy,glogiotatidis/mopidy,jcass77/mopidy,woutervanwijk/mopidy,vrs01/mopidy,hkariti/mopidy,dbrgn/mopidy,mokieyue/mopidy,tkem/mopidy,bacontext/mopidy,abarisain/mopidy,bacontext/mopidy,adamcik/mopidy,ZenithDK/mopidy,ZenithDK/mopidy,pacificIT/mopidy,swak/mopidy,dbrgn/mopidy,bacontext/mopidy,jmarsik/mopidy,mokieyue/mopidy,priestd09/mopidy,swak/mopidy,rawdlite/mopidy,adamcik/mopidy,jodal/mopidy,diandiankan/mopidy,pacificIT/mopidy,bacontext/mopidy,liamw9534/mopidy,pacificIT/mopidy,rawdlite/mopidy,SuperStarPL/mopidy,mokieyue/mopidy,vrs01/mopidy,tkem/mopidy,woutervanwijk/mopidy,glogiotatidis/mopidy,rawdlite/mopidy,rawdlite/mopidy,priestd09/mopidy,hkariti/mopidy,quartz55/mopidy,kingosticks/mopidy,liamw9534/mopidy,jodal/mopidy,SuperStarPL/mopidy,ZenithDK/mopidy,ali/mopidy,glogiotatidis/mopidy,mopidy/mopidy,SuperStarPL/mopidy,jcass77/mopidy,jmarsik/mopidy,dbrgn/mopidy,jcass77/mopidy,diandiankan/mopidy,pacificIT/mopidy,quartz55/mopidy,ali/mopidy,ali/mopidy,priestd09/mopidy,adamcik/mopidy,SuperStarPL/mopidy,swak/mopidy,quartz55/mopidy,mopidy/mopidy,bencevans/mopidy