Rewrote indentation detection

More robust and easier to customize.

modules/emacs/eshell/config.el

@@ -71,6 +71,8 @@ You should use `det-eshell-alias!' to change this.")
         eshell-glob-case-insensitive t
         eshell-error-if-no-glob t)
 
+  (add-to-list 'doom-detect-indentation-excluded-modes 'eshell-mode nil #'eq)
+
   ;; Consider eshell buffers real
   (add-hook 'eshell-mode-hook #'doom|mark-buffer-as-real)