Some existent EPUB books contain undesired object replacement characters (U+0xFFFC). Books app would like that WebKit does not render them.
<rdar://problem/117087591>
Pull request: https://github.com/WebKit/WebKit/pull/22520
Committed 272830@main (f37fd4bfde59): <https://commits.webkit.org/272830@main> Reviewed commits have been landed. Closing PR #22520 and removing active labels.