Revise C-a/C-e/C-u/C-w/C-b/C-f keybinds

+ C-b/C-f/C-w/C-u are from vim, and so will only be set for evil users.
+ C-a/C-e exists in both vim and Emacs, so we make them smarter for both
  users.

modules/config/default/+evil-bindings.el

@@ -808,15 +808,13 @@ customized by changing `+default-repeat-forward-key' and
 ;; Universal evil integration
 
 (when (featurep! :feature evil +everywhere)
-  ;; Restore C-a, C-e and C-u and make them a little smarter. C-a will jump to
-  ;; indentation. Pressing it again will send you to the true bol. Same goes for
-  ;; C-e, except it will ignore comments+trailing whitespace before jumping to
-  ;; eol. C-u will act similarly to C-a.
-  (define-key!
-    "C-a" #'doom/backward-to-bol-or-indent
-    "C-e" #'doom/forward-to-last-non-comment-or-eol
-    "C-u" #'doom/backward-kill-to-bol-and-indent
-    "C-w" #'backward-kill-word)
+  ;; Have C-u behave similarly to `doom/backward-to-bol-or-indent'.
+  ;; NOTE SPC u replaces C-u as the universal argument.
+  (map! :gi "C-u" #'doom/backward-kill-to-bol-and-indent
+        :gi "C-w" #'backward-kill-word
+        ;; Vimmish ex motion keys
+        :gi "C-b" #'backward-word
+        :gi "C-f" #'forward-word)
 
   (after! view
     (define-key view-mode-map [escape] #'View-quit-all))

modules/config/default/config.el

@@ -141,9 +141,6 @@
     "A-x"  #'execute-extended-command)
 
   (define-key!
-    ;; Ensure Emacsien motions are available
-    "C-b" #'backward-word
-    "C-f" #'forward-word
     ;; Buffer-local font scaling
     "M-+" (λ! (text-scale-set 0))
     "M-=" #'text-scale-increase
@@ -170,6 +167,12 @@
     ;; textmate-esque deletion
     [M-backspace] #'doom/backward-kill-to-bol-and-indent)
 
+  ;; Smarter C-a/C-e for both Emacs and Evil. C-a will jump to indentation.
+  ;; Pressing it again will send you to the true bol. Same goes for C-e, except
+  ;; it will ignore comments+trailing whitespace before jumping to eol.
+  (map! :gi "C-a" #'doom/backward-to-bol-or-indent
+        :gi "C-e" #'doom/forward-to-last-non-comment-or-eol)
+
   (if (featurep 'evil)
       (load! "+evil-bindings")
     (load! "+emacs-bindings")))