Formatter removing necessary parentheses in math

[icegoat9]

I saw some unexpected program behavior after autoformatting, and tracked it down to the formatter removing necessary parentheses in math expressions, which changes the order of operations.

Simple example:

x = 20 - (2 + 3 * 4)

autoformats to:

x = 20 - 2 + 3 * 4

Another example:

x = not (true and false)

Autoformats to the logically different expression:

x = not true and false