bump: ws-butler

hlissner/ws-butler@572a10c11b -> lewang/ws-butler@e3a38d93e0

I switch back to upstream ws-butler to reduce maintenance burden, and
because the two issues my fork resolves are now resolved upstream, in
doom-modeline (see lewang/ws-butler#31). I also change
ws-butler-keep-whitespace-before-point to its default for #7843.

Revert: c59ae5d172
Ref: lewang/ws-butler#31
Close: #7843
Fix: #7516

lisp/doom-editor.el

@@ -730,11 +730,12 @@ on."
   ;; a less intrusive `delete-trailing-whitespaces' on save
   :hook (doom-first-buffer . ws-butler-global-mode)
   :config
-  ;; ws-butler normally preserves whitespace in the buffer (but strips it from
-  ;; the written file). While sometimes convenient, this behavior is not
-  ;; intuitive. To the average user it looks like whitespace cleanup is failing,
-  ;; which causes folks to redundantly install their own.
-  (setq ws-butler-keep-whitespace-before-point nil))
+  (pushnew! ws-butler-global-exempt-modes
+            'special-mode
+            'comint-mode
+            'term-mode
+            'eshell-mode
+            'diff-mode))
 
 (provide 'doom-editor)
 ;;; doom-editor.el ends here