fix: [stix export] Fixed pep8 & changed indentation for better readability
fix: [stix export] Fixed pep8 & changed indentation for better readability

SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP