This helps work around bugs in editors that may get confused about relative
paths (like nvim-remote, see https://github.com/neovim/neovim/issues/18519), and
shouldn't have any negative effect on others.
The "open" command is supposed to behave in the same way as double-clicking a
file in the Finder/Explorer. The concept of jumping to a specific line in the
file doesn't make sense for this; use "edit" instead.
