fixed #807 - #811

Well this should fix it, but now all negations will have a space in them.

Sorry, I underestimated its problem.

I'll fix it soon!

This might even be an issue in my pattern-arrows library. I'll have a look as well.

I think the way to solve this is much like the way you've done now, except also disallow negative numbers in JSNumericLiteral and require those to be unary negation operations (which is how JavaScript actually works anyway). This will have the added benefit of handling negate (negate -1) properly, which this current patch does not do.

I agree. so I rewrote. but I think It can fix easily even if JSNumericLiteral has sign.
Moreover, I think that independent negate can optimize easily. negate (negate a) to a.

Maybe, removeSignedLiterals should be renamed.

Looks good to me. @michaelficarra ?

Very nice. 👍