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107e4d11de
Another regression from d51f669647 (Vi mode: avoid placing cursor beyond last
character, 2024-02-14) "Unfortunately Vi mode sometimes needs to temporarily
select past end". So do the replace_one mode bindings which were forgotten.
Fix this.
This surfaces a tricky problem: when we use something like
bind '' self-insert some-command
When key event "x" matches this generic binding, we insert both "self-insert"
and "some-command" at the front of the queue, and do *not* consume "x",
since the binding is empty.
Since there is a command (that might call "exit"), we insert a check-exit
event too, after "self-insert some-command" but _before_ "x".
The check-exit event makes "self-insert" do nothing. I don't think there's a
good reason for this; self-insert can only be triggered by a key event that
maps to self-insert; so there must always be a real key available for it to
consume. A "commandline -f self-insert" is a nop. Skip check-exit here.
Fixes #11484