@let-def's fix for issue #553 (7efcb22) introduces a bug in Neovim where the current line jumps to the top of the window on repeated calls to MerlinTypeOf. I do not yet understand why; only that I can reproduce it reliably.

1. Open Neovim to a single OCaml file. It must be the only window in the tab (not sure why).
2. Scroll down a bit so the top of your window is not at line 1 (again, not sure why).
3. Put your cursor over some OCaml value and run :MerlinTypeOf. Observe that works correctly.
4. Now run :MerlinTypeOf again on any value in the same line.
5. Observe that the window scrolls s.t. the current line is now at the top of the window.

I wonder whether 7efcb22 is still needed. When I tried undoing those changes the new issue disappears and I was unable to reproduce issue #553 (my type history buffer seems to work fine). Maybe a change to neovim and/or merlin in the last 4 years has obviated this change. Still, I don't really understand why this new bug happens -- it's pretty bizarre.