[Octave-patch-tracker] [patch #8534] For GUI undo, send Cntrl-U to Readline rather than callback command_editor.

[Mike Miller]

Follow-up Comment #2, patch #8534 (project octave):

Yes, absolutely. So this patch would accomplish sending a Ctrl-u to the
command window when focused, but that may or may not do anything related to an
"undo" readline action. Ctrl-u means "unix-line-discard" for me (erase the
entire input line), not "undo", which is bound to Ctrl-_ by default.

The rest of this patch is probably fine, but I don't think the TerminalView
can really do anything about an undo action from the GUI.

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