Foldmethod is not reset after `:Diffoff`

[savchenko]

After executing :Diffoff, foldmethod stays at diff. Can be reproduced as following:

1. Open two files in vertical splits, have foldmethod set to marker
2. Switch to visual mode, select lines in both
3. :Diffthis
4. Execute :Diffoff in both splits
5. :set foldmethod?

On the side-note, I would be handy to have single command that exits the diff mode and restores the window layout back to what it was.

Tested on nvim v0.10.2

[rickhowe]

I tried but can not reproduce it on my nvim 0.10.2.

I think you are talking about spotdiff.vim, right?
If the undocumented DiffRangeView variable includes f, Diffthis sets the option to manual and Diffoff returns it back to the original. It works fine.

Does vim original diffthis and diffoff have the same problem?