* Added event_chars property to confirm_done event
Currently it seems there is no way for someone listening to the
`confirm_done` event to know exactly what character was used to commit
the completion confirmation.
This commit adds a `event_chars` property to the `confirm_done` event.
Its value is just the `chars` variable form the `core.on_keymap`
function.
* Renamed `commid_chars` to `commit_character`
3a2f1bbc55