yet another undo issue on vim

[glyh]

To reproduce:

1. create a file with bad indentation:

{
    }

2. Open it with vim
3. keep pressing undos

You'll see nothing happens, and a fairly long undo tree generated ( which can be inspected by undo-tree plugins).
I think maybe it'll be better if parinfer can turn it off when the text is modified via undos and redos.

[johannesrld]

im also getting this issue in neovim

[johannesrld]

I've fixed this bug in https://github.com/johannesrld/parinfer-rust/tree/fix-undo-explosions, please let me know if it works for you :)