fix silly issue when parsing advisory for JSON printing
fix silly issue when parsing advisory for JSON printing

fugitifduck/exabgp,dneiter/exabgp,PowerDNS/exabgp,blablacar/exabgp,blablacar/exabgp,PowerDNS/exabgp,PowerDNS/exabgp,lochiiconnectivity/exabgp,benagricola/exabgp,benagricola/exabgp,earies/exabgp,dneiter/exabgp,blablacar/exabgp,lochiiconnectivity/exabgp,earies/exabgp,dneiter/exabgp,fugitifduck/exabgp,earies/exabgp,fugitifduck/exabgp,lochiiconnectivity/exabgp,benagricola/exabgp