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Justin M. Keyes
c4452903e3
Problem:
- nvim_buf_call() aborts (assert) when called from an expression evaluated
for a window in another tabpage ('foldexpr', 'statusline'), because
`curwin` is not in `curtab`.
- After it returns, `curwin` is wrong if it switched windows.
- `vim._with{win=…, keepcwd=true}` does not undo `:lcd` if `win` is in
another tabpage.
Solution:
- Allow `curwin` outside `curtab`, and restore if it was outside
`curtab` at `ctx_switch()`.
- Find the target window in any tabpage when restoring its dirs.