docs: clarify single-quote comment is for Unix
docs: clarify single-quote comment is for Unix

Freso/beets,Andypsamp/CODjunit,PierreRust/beets,Dishwishy/beets,tima/beets,pkess/beets,Kraymer/beets,imsparsh/beets,artemutin/beets,sadatay/beets,dfc/beets,PierreRust/beets,lightwang1/beets,tima/beets,jcoady9/beets,Freso/beets,m-urban/beets,beetbox/beets,arabenjamin/beets,Andypsamp/CODjunit,lengtche/beets,mried/beets,imsparsh/beets,lightwang1/beets,ibmibmibm/beets,jbaiter/beets,Andypsamp/CODfinalJUNIT,kelvinhammond/beets,m-urban/beets,sampsyo/beets,mosesfistos1/beetbox,randybias/beets,kareemallen/beets,jcoady9/beets,diego-plan9/beets,imsparsh/beets,kareemallen/beets,sadatay/beets,marcuskrahl/beets,xsteadfastx/beets,tima/beets,YetAnotherNerd/beets,pkess/beets,Dishwishy/beets,aspidites/beets,jayme-github/beets,jmwatte/beets,marcuskrahl/beets,asteven/beets,jackwilsdon/beets,LordSputnik/beets,madmouser1/beets,mried/beets,Andypsamp/CODfinalJUNIT,YetAnotherNerd/beets,Kraymer/beets,parapente/beets,SusannaMaria/beets,shamangeorge/beets,Wen777/beets,shamangeorge/beets,drm00/beets,bj-yinyan/beets,andremiller/beets,imsparsh/beets,PierreRust/beets,untitaker/beets,mathstuf/beets,untitaker/beets,mathstuf/beets,arabenjamin/beets,Andypsamp/CODjunit,jackwilsdon/beets,parapente/beets,xsteadfastx/beets,aspidites/beets,madmouser1/beets,sadatay/beets,bj-yinyan/beets,diego-plan9/beets,shamangeorge/beets,artemutin/beets,mathstuf/beets,marcuskrahl/beets,ibmibmibm/beets,swt30/beets,krig/beets,Wen777/beets,swt30/beets,dfc/beets,MyTunesFreeMusic/privacy-policy,gabrielaraujof/beets,pkess/beets,shanemikel/beets,drm00/beets,xsteadfastx/beets,Andypsamp/CODfinalJUNIT,Dishwishy/beets,swt30/beets,mried/beets,lengtche/beets,gabrielaraujof/beets,arabenjamin/beets,Freso/beets,moodboom/beets,SusannaMaria/beets,asteven/beets,beetbox/beets,artemutin/beets,YetAnotherNerd/beets,parapente/beets,ibmibmibm/beets,parapente/beets,ttsda/beets,MyTunesFreeMusic/privacy-policy,bj-yinyan/beets,Wen777/beets,Freso/beets,andremiller/beets,arabenjamin/beets,Dishwishy/beets,randybias/beets,LordSputnik/beets,SusannaMaria/beets,lightwang1/beets,lengtche/beets,randybias/beets,mathstuf/beets,Andypsamp/CODfinalJUNIT,diego-plan9/beets,dfc/beets,pkess/beets,kelvinhammond/beets,PierreRust/beets,madmouser1/beets,ttsda/beets,jbaiter/beets,sampsyo/beets,ttsda/beets,marcuskrahl/beets,kelvinhammond/beets,diego-plan9/beets,Andypsamp/CODfinalJUNIT,untitaker/beets,Kraymer/beets,multikatt/beets,ruippeixotog/beets,kelvinhammond/beets,krig/beets,xsteadfastx/beets,ruippeixotog/beets,ruippeixotog/beets,multikatt/beets,gabrielaraujof/beets,m-urban/beets,jmwatte/beets,sadatay/beets,multikatt/beets,jcoady9/beets,kareemallen/beets,Andypsamp/CODjunit,sampsyo/beets,ruippeixotog/beets,MyTunesFreeMusic/privacy-policy,mried/beets,shamangeorge/beets,lightwang1/beets,LordSputnik/beets,jcoady9/beets,moodboom/beets,lengtche/beets,dfc/beets,gabrielaraujof/beets,beetbox/beets,shanemikel/beets,jayme-github/beets,jackwilsdon/beets,moodboom/beets,bj-yinyan/beets,multikatt/beets,randybias/beets,drm00/beets,jmwatte/beets,drm00/beets,mosesfistos1/beetbox,shanemikel/beets,madmouser1/beets,Kraymer/beets,kareemallen/beets,andremiller/beets,moodboom/beets,m-urban/beets,YetAnotherNerd/beets,LordSputnik/beets,Andypsamp/CODjunit,artemutin/beets,jmwatte/beets,pdf/beets,mosesfistos1/beetbox,untitaker/beets,ttsda/beets,beetbox/beets,tima/beets,ibmibmibm/beets,swt30/beets,sampsyo/beets,shanemikel/beets,jackwilsdon/beets,SusannaMaria/beets,asteven/beets,mosesfistos1/beetbox,MyTunesFreeMusic/privacy-policy,krig/beets,asteven/beets,pdf/beets