Specific repro steps in Mail, on macOS: 1. Set system language to an RTL language, such as Hebrew or Arabic. 2. Switch to an LTR input language/locale, such as en_US. 3. Reply to an email with LTR content. 4. Set the selection inside the quoted content, and hit enter to break apart the blockquote. 5. Type anything (e.g., "hello") Expected: the text inserted in step 5 should be LTR. Observed: the text inserted in step 5 is RTL.
rdar://14839536
Pull request: https://github.com/WebKit/WebKit/pull/898
Committed r294714 (250901@main): <https://commits.webkit.org/250901@main> Reviewed commits have been landed. Closing PR #898 and removing active labels.