replace &minus; with plain `-`, as per #49
replace &minus; with plain `-`, as per #49

ondras/rot.js,MichelCarroll/rot.js,mohsenil85/rot.js,AEtherSurfer/rot.js,mboersma/rot.js,ondras/rot.js,shelsonjava/rot.js,hyakugei/rot.js,mboersma/rot.js,mohsenil85/rot.js,MichelCarroll/rot.js,MichelCarroll/rot.js,hyakugei/rot.js,hyakugei/rot.js,OdeFu/rot.js,shelsonjava/rot.js,AEtherSurfer/rot.js,shelsonjava/rot.js,mboersma/rot.js,ondras/rot.js,OdeFu/rot.js,OdeFu/rot.js,AEtherSurfer/rot.js