s/get(list)/as_str_seq() for keys in duplicates plugin
s/get(list)/as_str_seq() for keys in duplicates plugin

stolen from @sampsyo in the click branch

pkess/beets,ibmibmibm/beets,xsteadfastx/beets,mosesfistos1/beetbox,beetbox/beets,sampsyo/beets,diego-plan9/beets,MyTunesFreeMusic/privacy-policy,xsteadfastx/beets,shamangeorge/beets,diego-plan9/beets,artemutin/beets,lengtche/beets,artemutin/beets,SusannaMaria/beets,lengtche/beets,jackwilsdon/beets,jackwilsdon/beets,xsteadfastx/beets,pkess/beets,madmouser1/beets,mosesfistos1/beetbox,lengtche/beets,pkess/beets,shamangeorge/beets,pkess/beets,Kraymer/beets,jackwilsdon/beets,sampsyo/beets,madmouser1/beets,beetbox/beets,SusannaMaria/beets,SusannaMaria/beets,sampsyo/beets,ibmibmibm/beets,madmouser1/beets,MyTunesFreeMusic/privacy-policy,beetbox/beets,Kraymer/beets,Kraymer/beets,xsteadfastx/beets,lengtche/beets,SusannaMaria/beets,mosesfistos1/beetbox,diego-plan9/beets,beetbox/beets,Kraymer/beets,jackwilsdon/beets,MyTunesFreeMusic/privacy-policy,madmouser1/beets,artemutin/beets,shamangeorge/beets,MyTunesFreeMusic/privacy-policy,sampsyo/beets,mosesfistos1/beetbox,artemutin/beets,diego-plan9/beets,ibmibmibm/beets,ibmibmibm/beets,shamangeorge/beets