In whitespace preserving editable region, InsertLineBreak can sometimes insert a non-breaking space instead of a new line character.
Pull request: https://github.com/WebKit/WebKit/pull/10071
Committed 260243@main (093ca30b56a3): <https://commits.webkit.org/260243@main> Reviewed commits have been landed. Closing PR #10071 and removing active labels.
<rdar://problem/105439065>
Re-opening for pull request https://github.com/WebKit/WebKit/pull/10080
Committed 260246@main (6312ca8a6621): <https://commits.webkit.org/260246@main> Reviewed commits have been landed. Closing PR #10080 and removing active labels.