Add StringScanner#[] to fix bug in parsing heredocs
Add StringScanner#[] to fix bug in parsing heredocs

bbatsov/opal,Flikofbluelight747/opal,iliabylich/opal,merongivian/opal,gausie/opal,jannishuebl/opal,opal/opal,suyesh/opal,domgetter/opal,fazibear/opal,c42engineering/opal,Ajedi32/opal,catprintlabs/opal,castwide/opal,iliabylich/opal,opal/opal,suyesh/opal,wied03/opal,bbatsov/opal,gabrielrios/opal,bbatsov/opal,wied03/opal,jgaskins/opal,opal/opal,catprintlabs/opal,catprintlabs/opal,fazibear/opal,iliabylich/opal,domgetter/opal,opal/opal,castwide/opal,kachick/opal,jgaskins/opal,suyesh/opal,kachick/opal,c42engineering/opal,Mogztter/opal,kachick/opal,gabrielrios/opal,c42engineering/opal,gausie/opal,kachick/opal,merongivian/opal,gausie/opal,gabrielrios/opal,jannishuebl/opal,merongivian/opal,jgaskins/opal,Flikofbluelight747/opal,Mogztter/opal,wied03/opal,castwide/opal,Mogztter/opal,fazibear/opal,Mogztter/opal,jannishuebl/opal,Ajedi32/opal,Ajedi32/opal,Flikofbluelight747/opal