Shift / Ctrl / Option / Cmd text selection for the fish command line — select by character, word or line, and delete the selection with Backspace or Delete.
fish 4.0 or newer. These bindings use fish 4's named keys (ctrl-shift-right)
instead of raw escape sequences. On fish 3.x they silently misbehave — there,
bind backspace ... binds the literal letters b,a,c,k,s,p,a,c,e rather than the