Option + Up and Option + Down do not move the caret or extend the selection beyond the current line. <rdar://problem/51404312>
Created attachment 374276 [details] Fixes the bug
Created attachment 374277 [details] Fixes the bug
Comment on attachment 374277 [details] Fixes the bug Clearing flags on attachment: 374277 Committed r247524: <https://trac.webkit.org/changeset/247524>
All reviewed patches have been landed. Closing bug.
<rdar://problem/53212341>
Removed the superfluous header file for the test in https://trac.webkit.org/changeset/247536.