Update comments

core/core-keybinds.el

@@ -46,6 +46,8 @@ and Emacs states, and for non-evil users.")
                    (not (cl-position 'tab    keys))
                    (not (cl-position 'kp-tab keys))
                    (display-graphic-p)
+                   ;; Fall back if no <C-i> keybind can be found, otherwise
+                   ;; we've broken all pre-existing C-i keybinds.
                    (let ((key
                           (doom-lookup-key
                            (vconcat (cl-subseq keys 0 -1) [C-i]))))