Since `WITH-GRAMMAR` is only used in `DEFINE-GRAMMAR`, its functionality may be added to `DEFINE-GRAMMAR` instead of splitting it away. [parser.lisp L99](https://github.com/SRechenberger/cl-parser-gen/blob/refactor-parser/src/parser.lisp#L99)
Since
WITH-GRAMMARis only used inDEFINE-GRAMMAR, its functionality may be added toDEFINE-GRAMMARinstead of splitting it away.parser.lisp L99