Keymaps should record only 1 entry to the modification history

[k2d222]

Custom sequence keymaps (defined in user's config.toml) will execute the commands in sequence but also record each modification to the history. Undoing will undo the individual components of the sequence keymap, not the keymap as a whole.

An example:
A-s = [ "extend_to_line_bounds", "delete_selection", "paste_after" ]
This keymap will swap a line with the one below. But it requires 2 undos for paste_after and delete_selection

Possible solution:
Add commands to start / stop recording individual modifications to history. When recording is stopped, modifications will update the last history Revision instead of adding new ones.

If this feature request is found interesting, I would happily have a go at implementing it 😃

[Omnikar]

Yeah, it was decided to momentarily skip this behaviour in the original implementation: #589 (comment).

I do agree though that it is annoying; I can go back and implement it, and it'll be useful for macros as well, since they have the same issue.

[Omnikar]

So, this turns out to be a bit tricky due to the fact that Documents keep their own individual histories, and command sequences are capable of switching the current document.