At the same time rename isASCIISpace to isCCompatibleASCIIWhitespace to make it more clear you probably want to avoid it.
<rdar://problem/108419120>
Pull request: https://github.com/WebKit/WebKit/pull/13077
Committed 263290@main (7f7aade4cf4a): <https://commits.webkit.org/263290@main> Reviewed commits have been landed. Closing PR #13077 and removing active labels.