Fix constant lookup syntax
Fix constant lookup syntax

The previous syntax is invalid in MRI, see #548.

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