WebKit issue #171805 contained an imported fix from Chromium to properly compute the inter-character spacing (off-by-one). Continue the work to make textLength fully functional on <tspan> elements, in a few edge cases related to whitespace/text chunk handling.
Pull request: https://github.com/WebKit/WebKit/pull/14211
<rdar://problem/109981392>
Committed 264666@main (a9ba148c1a17): <https://commits.webkit.org/264666@main> Reviewed commits have been landed. Closing PR #14211 and removing active labels.