Fix regexlint-noticed problems in Monkey lexer
Fix regexlint-noticed problems in Monkey lexer

pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments,pathawks/pygments