Downstream bug report
https://phabricator.wikimedia.org/T137394
URL that exhibits the bug:
https://phabricator.wikimedia.org/rOPUPa660414f0a1af1963b23b6b02ff6e57794d8756f
How to reproduce
Set diffs to side-by-side on the above-linked commit.
What I see
Observations
I think this is happening because the innermost span is set to display: inline-block
The problem goes away when I disable this css rule:
.remarkup-code td span { display: inline-block }