The newly imported test multicol-span-all-margin-nested-003.xht is failing. The expected result that assumes the width of 22em doesn't seem right either but the fact we don't occupy the entire width of body is not right either. In addition, if we remove "font-family: Ahem" in Inspector, we get weird residual painting of the column contents.
<rdar://problem/22583697>
It was removed as WPT test from Chromium / blink and we don’t have this in our LayoutTests as well. Link - https://chromium.googlesource.com/chromium/src/+/ff25a70575bec00552a2c7a6ac9de7a539fe0960 Marking this as “RESOLVED WONTIFX”.