Round results from gutter division to prevent decimal margins and padding

[thomasphorton]

Fixes #16281

left rounds up, right rounds down. should keep everything playing nice.

[mdo]

Nice, I think this should be good to go. The default code doesn't change obviously, and it should handle that half pixel problem nicely.

[kminek]

this change breaks computing for non-px values. suppose i would like to use only grids from bs and set @grid-gutter-width: 3em - i would expect 1.5em value should be set on both sides - currently it's not :(

[thomasphorton]

What behavior do you see? Does one go to 1 and the other 2?

That's a big oversight on my part. If you give me some more information I'll look into a fix.

[zacechola]

Open up a new issue, @kminek.

[mdo]

Yeah, that's a valid concern. If that's the case, I'm actually in favor of removing any and all rounding for the grid. We've gotten by for nearly two years without it, we can stick it out until v4 :).

[kminek]

i would also remove rounding and take approach suggested in #16281 - that is to introduce optional variables for left-/right-gutter-part :)