In https://bugs.webkit.org/show_bug.cgi?id=271896, we replaced usage of deprecatedIsSpaceOrNewline with isUnicodeWhitespace. Importantly, isUnicodeWhitespace trims non-breaking space characters, which is not the correct thing to do when computing accessibility text (we should only trim ASCII whitespace).
<rdar://problem/127084721>
Created attachment 471148 [details] Patch
Committed 278028@main (95e791e34021): <https://commits.webkit.org/278028@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 471148 [details].