The 'initial-value' descriptor has syntax <declaration-value> and it should preserve whitespace. https://drafts.csswg.org/css-syntax-3/#typedef-declaration-value
<rdar://problem/103607902>
Pull request: https://github.com/WebKit/WebKit/pull/7969
Committed 258215@main (11eb340cd2d8): <https://commits.webkit.org/258215@main> Reviewed commits have been landed. Closing PR #7969 and removing active labels.