Formula grammar online edit/test

[mingodad]

I've just added grammar-parser.jison to https://mingodad.github.io/parsertl-playground/playground/ an online Yacc/Lex compatible editor/tester (select Fortnue sheet formula parser from Examples then click Parse to see a parser tree for the content in Input source editor).

I hope it can help debug/develop/document/test the grammar from this project !

Any feedback is welcome !

[zyc9012]

Awesome! Thank you @mingodad