What is the crocodoc-subpx-fix for?

[abejfehr]

Namely, this line.

The reason that I'm asking is because the zoom/transform combo happens in IE11 before the width: 1000% is calculated, resulting in an element that's 10x as wide as it's supposed to be. Now custom page content which is centered appears outside of the viewport.

I'd like to override the class to remove these values, but I don't want to remove any functionality they might have brought. What was the rationale behind scaling everything down 10x and zooming in 10x again?