test: use f-strings in feature_filelock.py
test: use f-strings in feature_filelock.py

lateminer/bitcoin,instagibbs/bitcoin,tecnovert/particl-core,ajtowns/bitcoin,namecoin/namecoin-core,Xekyo/bitcoin,sstone/bitcoin,achow101/bitcoin,jambolo/bitcoin,jlopp/statoshi,prusnak/bitcoin,bitcoin/bitcoin,dscotese/bitcoin,GroestlCoin/GroestlCoin,mruddy/bitcoin,jamesob/bitcoin,jamesob/bitcoin,namecoin/namecore,namecoin/namecore,bitcoin/bitcoin,jambolo/bitcoin,sstone/bitcoin,sipsorcery/bitcoin,pataquets/namecoin-core,Xekyo/bitcoin,achow101/bitcoin,Xekyo/bitcoin,mruddy/bitcoin,kallewoof/bitcoin,sstone/bitcoin,bitcoin/bitcoin,domob1812/bitcoin,andreaskern/bitcoin,bitcoinsSG/bitcoin,kallewoof/bitcoin,namecoin/namecoin-core,jambolo/bitcoin,kallewoof/bitcoin,instagibbs/bitcoin,fanquake/bitcoin,anditto/bitcoin,dscotese/bitcoin,andreaskern/bitcoin,prusnak/bitcoin,MarcoFalke/bitcoin,MarcoFalke/bitcoin,MarcoFalke/bitcoin,namecoin/namecore,namecoin/namecore,lateminer/bitcoin,fanquake/bitcoin,mruddy/bitcoin,mm-s/bitcoin,mm-s/bitcoin,domob1812/namecore,Xekyo/bitcoin,andreaskern/bitcoin,mruddy/bitcoin,fujicoin/fujicoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,tecnovert/particl-core,particl/particl-core,andreaskern/bitcoin,yenliangl/bitcoin,domob1812/namecore,dscotese/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,bitcoin/bitcoin,namecoin/namecore,prusnak/bitcoin,ajtowns/bitcoin,mm-s/bitcoin,jamesob/bitcoin,particl/particl-core,ajtowns/bitcoin,bitcoinknots/bitcoin,ajtowns/bitcoin,GroestlCoin/GroestlCoin,fujicoin/fujicoin,GroestlCoin/GroestlCoin,ajtowns/bitcoin,mruddy/bitcoin,yenliangl/bitcoin,achow101/bitcoin,AkioNak/bitcoin,particl/particl-core,pataquets/namecoin-core,jlopp/statoshi,bitcoinknots/bitcoin,namecoin/namecoin-core,prusnak/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/bitcoin,kallewoof/bitcoin,yenliangl/bitcoin,anditto/bitcoin,anditto/bitcoin,andreaskern/bitcoin,GroestlCoin/bitcoin,sstone/bitcoin,bitcoinknots/bitcoin,sipsorcery/bitcoin,Xekyo/bitcoin,pataquets/namecoin-core,fanquake/bitcoin,GroestlCoin/bitcoin,kallewoof/bitcoin,Xekyo/bitcoin,instagibbs/bitcoin,lateminer/bitcoin,sipsorcery/bitcoin,bitcoinsSG/bitcoin,jamesob/bitcoin,namecoin/namecoin-core,pataquets/namecoin-core,prusnak/bitcoin,fanquake/bitcoin,bitcoinsSG/bitcoin,jamesob/bitcoin,prusnak/bitcoin,yenliangl/bitcoin,domob1812/bitcoin,AkioNak/bitcoin,instagibbs/bitcoin,domob1812/namecore,anditto/bitcoin,achow101/bitcoin,jlopp/statoshi,domob1812/bitcoin,lateminer/bitcoin,bitcoinsSG/bitcoin,tecnovert/particl-core,ajtowns/bitcoin,MarcoFalke/bitcoin,AkioNak/bitcoin,sipsorcery/bitcoin,namecoin/namecoin-core,jambolo/bitcoin,dscotese/bitcoin,domob1812/bitcoin,domob1812/bitcoin,tecnovert/particl-core,jlopp/statoshi,anditto/bitcoin,mruddy/bitcoin,yenliangl/bitcoin,bitcoinsSG/bitcoin,AkioNak/bitcoin,domob1812/namecore,instagibbs/bitcoin,namecoin/namecore,instagibbs/bitcoin,bitcoinknots/bitcoin,anditto/bitcoin,mm-s/bitcoin,fujicoin/fujicoin,fujicoin/fujicoin,jambolo/bitcoin,sstone/bitcoin,GroestlCoin/GroestlCoin,bitcoinknots/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,particl/particl-core,sstone/bitcoin,particl/particl-core,bitcoin/bitcoin,kallewoof/bitcoin,mm-s/bitcoin,pataquets/namecoin-core,jamesob/bitcoin,fanquake/bitcoin,jlopp/statoshi,achow101/bitcoin,domob1812/bitcoin,tecnovert/particl-core,AkioNak/bitcoin,MarcoFalke/bitcoin,sipsorcery/bitcoin,lateminer/bitcoin,domob1812/namecore,GroestlCoin/bitcoin,GroestlCoin/bitcoin,MarcoFalke/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,particl/particl-core,yenliangl/bitcoin,sipsorcery/bitcoin,namecoin/namecoin-core,dscotese/bitcoin,AkioNak/bitcoin,mm-s/bitcoin,fanquake/bitcoin,andreaskern/bitcoin,domob1812/namecore,dscotese/bitcoin,jambolo/bitcoin,GroestlCoin/GroestlCoin,achow101/bitcoin,jlopp/statoshi