Redo after save changes cursor position

[expipiplus1]

Very similar to #4

• vim Foo.hs
• Make a change
• :w (run stylish-haskell)
• u (undo (works correctly))
• C-r (redo (works correctly but the cursor changes position))

Here it is in action: https://asciinema.org/a/2brc81mggtb85g7hz1rbfxrqm