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

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