formulas expect case sensitive ranges

[jon-chin]

reproduces in the demo sheet via SUM(e10)

console:
ERROR: Expected expression or right paren

does it need to be this way because of the negative column addresses?

[davidkircos]

It's worth thinking about how to improve this, as it is confusing.

[luke-quadratic]

doesn't seem important atm and is v stale, worth closing for now to be reopened when we get back to working on formulas stuff? @davidkircos

[davidkircos]

I think it's work leaving it open. There is probably a whole set of Formulas work that we should get into in the next couple of months.

[AyushAgrawal-A2]

fixed in #2108