Unnecessary params and negative numbers

[j-panasiuk]

This is a tiny nitpick, but it seems that unnecessary params around a number/expression/constant with negation sign are not reported.

Reporting unnecessary params:

(toFloat 5) / 2
(toFloat (3 + 3)) / 2
(toFloat width) / 2

Same thing here, but not reported:

(toFloat -5) / 2
(toFloat -(3 + 3)) / 2
(toFloat -width) / 2