Bug fix in calc parsing when the first operand is a negative value

[raxbg]

These changes fix issues with rules like calc(-120% - 4px) and calc(8px + -50%)

[sabberworm]

Thanks. Can you also test for nested calcs? Both with braces or calc functions?

.test {
  font-size: calc((3 * 4px) + -2px);
  top: calc(200px - calc(20 * 3px));
}

[raxbg]

I remember that I tested these cases while I was working on the changes, but I must have forgotten to add unit tests for them. Should be ok now.