A class should be a kind_of its singleton_class (fixes #438)
A class should be a kind_of its singleton_class (fixes #438)

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