Variable names cannot include spaces

[wjeffery95]

It would be useful to be able to have spaces in variable to aid readability.

Example

const squareMyVariable = new Formula('[My Variable]^2');
fObj.evaluate({"My Variable": 3}); // Throws: Uncaught Error: Cannot evaluate MyVariable: No value given

The error is thrown because when the function is cleaned we remove all spaces meaning the variable no longer matches, and would instead have to be MyVariable.

[wjeffery95]

I'm happy to contribute a solution but don't see anything detailing how you'd like contributions to be submitted. Thanks

[bylexus]

I clean the formula intentionally (removing whitespaces), to make the parsing simpler. But this should not be a big problem to have it changed, I don't see any drawbacks from this feature.
If you want to contribute, just create a pull request.