Create a delete function for deleting a single character and overbind ctrl-d to that function. This will prevent fish from exiting when I hit ctrl-d, I use ctrl-d for things like ipython. I don't want to quit fish so easy, I can use leader-x in tmux for that.

dotfiles/.config/fish/config.fish

@@ -58,3 +58,4 @@ abbr python python
 set -gx GOPATH $HOME/go; set -gx GOROOT $HOME/.go; set -gx PATH $GOPATH/bin $PATH; # g-install: do NOT edit, see https://github.com/stefanmaric/g
 abbr cat batcat
 abbr pip pip3
+bind \cd delete

dotfiles/.config/fish/functions/delete.fish

@@ -0,0 +1,3 @@
+function delete
+commandline -f delete-char
+end