fetchart: PEP8 fixes
fetchart: PEP8 fixes

artemutin/beets,artemutin/beets,xsteadfastx/beets,LordSputnik/beets,artemutin/beets,mried/beets,beetbox/beets,MyTunesFreeMusic/privacy-policy,mosesfistos1/beetbox,LordSputnik/beets,shamangeorge/beets,LordSputnik/beets,SusannaMaria/beets,MyTunesFreeMusic/privacy-policy,lengtche/beets,MyTunesFreeMusic/privacy-policy,Kraymer/beets,lengtche/beets,jackwilsdon/beets,swt30/beets,swt30/beets,jackwilsdon/beets,swt30/beets,swt30/beets,diego-plan9/beets,ibmibmibm/beets,Kraymer/beets,xsteadfastx/beets,jcoady9/beets,madmouser1/beets,LordSputnik/beets,madmouser1/beets,ibmibmibm/beets,jcoady9/beets,jackwilsdon/beets,xsteadfastx/beets,SusannaMaria/beets,shamangeorge/beets,sampsyo/beets,mried/beets,jcoady9/beets,madmouser1/beets,xsteadfastx/beets,MyTunesFreeMusic/privacy-policy,mosesfistos1/beetbox,Freso/beets,shamangeorge/beets,mried/beets,SusannaMaria/beets,Freso/beets,parapente/beets,sampsyo/beets,mosesfistos1/beetbox,ibmibmibm/beets,Freso/beets,pkess/beets,parapente/beets,diego-plan9/beets,artemutin/beets,Kraymer/beets,Freso/beets,shamangeorge/beets,jackwilsdon/beets,mried/beets,sampsyo/beets,parapente/beets,pkess/beets,jcoady9/beets,diego-plan9/beets,beetbox/beets,lengtche/beets,beetbox/beets,Kraymer/beets,SusannaMaria/beets,beetbox/beets,parapente/beets,pkess/beets,mosesfistos1/beetbox,madmouser1/beets,diego-plan9/beets,lengtche/beets,sampsyo/beets,pkess/beets,ibmibmibm/beets