\s*(?:\*|\*?[a-z_])[a-zA-Z0-9_]*\s*)(,\g)*,?\s*$)|.*/(?1:|)/}${2:match}${2/(^(?\s*(?:\*|\*?[a-z_])[a-zA-Z0-9_]*\s*)(,\g)*,?\s*$)|.*/(?1:| )/}$0 }]]> gsu source.ruby gsub(/../) { |match| .. }