Per wpt.fyi: https://wpt.fyi/results/css/css-text/white-space/white-space-pre-wrap-trailing-spaces-021.html?label=master&label=experimental&product=safari-150%20preview&product=safari-151%20preview&view=subtest
<rdar://problem/98673361>
"An overflowing hanging glyph should typically be considered ink overflow so as to avoid creating unnecessary scrollbars, but the UA may treat it as scrollable overflow when the content is editable or in other circumstances where treating it as scrollable overflow would be useful to the user" the <span> </span> produces overhanging glyphs. They should not be considered when computing scrollable overflow.
Created attachment 461640 [details] [fast-cq]Patch
No reviewer information in commit message, blocking PR #None
Created attachment 461669 [details] [fast-cq]Patch
Committed 253465@main (a1cd009fd592): <https://commits.webkit.org/253465@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 461669 [details].