Revert "update fshow, from junegunn dotfiles"
Revert "update fshow, from junegunn dotfiles"

This reverts commit e49f77b7ef9096fa6374463dd479b3133f1f68cb.

- revert to old fshow behavior
  - can multi-select git diffs over range without vim-fugitive
    - recommend junegunn/gv.vim if this is what you want

atweiden/fzf-extras