Fix DOMDocument.save return type
Fix DOMDocument.save return type

peachpiecompiler/peachpie,iolevel/peachpie-concept,peachpiecompiler/peachpie,peachpiecompiler/peachpie,iolevel/peachpie,iolevel/peachpie,iolevel/peachpie,iolevel/peachpie-concept,iolevel/peachpie-concept