FortAwesome/Font-Awesome — pull request #1521 by InitArt (2013-07-08 21:46:31+00:00)
Title: LESS CSS strict maths update to be future proof

> In 1.4.0 this option is turned off, but we intend to turn this on by default. We recommend you upgrade code and switch on the option (–strict-math=on in the command line or strictMath: true in JavaScript). Code written with brackets is backwards compatible with older versions of the less compiler.