Comment 3 for bug 869069

Of the Vim packages, only vim-tiny is installed by default and it has a lower priority than nano. Choosing to install other editor packages implies that you know how to use them and won't be bothered by them now being the provider for editor.

If that's not true, then you can manually change the editor alternative to nano or set $EDITOR to sensible-editor (from the sensible-utils package) which will ask (and remember) what editor to use.