Can't undo snippets

This is actually related to the discussion of #6. When I expand a snippet using doom emacs (via TAB), it presents the snippet perfectly, but I can't undo the expansion of the snippet as #6 reported using the basic undo function.

I tried prettying ESC and C-g many times followed by many instances of undo, but the problem is that the snippet has created an undo branch point. In order to reverse it, we need to `M-x undo-tree-visualize` and then cursor through until we figure out where we intended to go.

I'm new to doom emacs as of yesterday - I've been using spacemacs with the same yasnippets ofr year (I literally copied over my `snippets` folder into my .doom.d), and in spacemacs I didn't I have problem using undoing.


I spent far too many hours on this trying to diagnose the problem (avoiding grading finals...). Do you any advice about what to try?

Start by reproducing the TAB-triggered snippet expansion in Doom Emacs with the copied snippets, then compare the undo behavior with the discussion in issue #6. The existing workaround is M-x undo-tree-visualize; done means a normal undo reverses the expansion without requiring manual navigation through an undo branch.

Written by the indexing model from the issue text.