fixing @extend combineSelectorSingle()
fixing @extend combineSelectorSingle()

dleffler/scssphp,g105b/scssphp,webdevid/scssphp,leafo/scssphp,webdevid/scssphp,dleffler/scssphp,webdevid/scssphp,leafo/scssphp,kkkyyy03/scssphp,dleffler/scssphp,leafo/scssphp,g105b/scssphp,g105b/scssphp