Minifier breaks CSS Calc Rules

[thre3eye]

Hi - great program but just debugged a weird issue.

From this:
height: calc(~"100% - (10 * (35px + 6px)) - 10px");
the Minifier produces this:
height:calc(100% -(10 *(35px + 6px)) - 10px)

Please note the removed space between minus sign and opening bracket. Chrome tolerates this, whereas IE does not and errors out. Could you please fix this according to spec (i.e. space required): https://drafts.csswg.org/css-values/#calc-syntax or let me know how to tweak the Minifier?

Thanks!

Edit: I switched to 'Globally Installed Less' and the issue goes away.