nit: comment revision, spellcheck, & reformatting

Close: #7262
Co-authored-by: emergenz <emergenz@users.noreply.github.com>

lisp/doom-start.el

@@ -274,20 +274,24 @@ If RETURN-P, return the message as a string instead of displaying it."
 
 
 ;;
-;;; Let 'er rip!
+;;; Load Doom's defaults and DSL
 
 ;;; Load core modules and set up their autoloads
 (require 'doom-modules)
-(autoload 'doom-initialize-packages "doom-packages")
 ;; TODO (autoload 'doom-profiles-initialize "doom-profiles")
 ;; TODO (autoload 'doom-packages-initialize "doom-packages")
 
 ;; UX: There's a chance the user will later use package.el or straight in this
 ;;   interactive session. If they do, make sure they're properly initialized
 ;;   when they do.
+(autoload 'doom-initialize-packages "doom-packages")
 (with-eval-after-load 'package (require 'doom-packages))
 (with-eval-after-load 'straight (doom-initialize-packages))
 
+
+;;
+;;; Let 'er rip!
+
 ;; A last ditch opportunity to undo dodgy optimizations or do extra
 ;; configuration before the session is complicated by user config and packages.
 (doom-run-hooks 'doom-before-init-hook)

lisp/doom.el

@@ -64,9 +64,10 @@
 ;; offensive) optimizations, and load the minimum for all Doom sessions.
 ;;
 ;;; Code:
+
+;; For `when-let' and `if-let' on versions of Emacs before they were autoloaded.
 (eval-when-compile (require 'subr-x))
 
-;;; Version checks
 (eval-and-compile  ; Check version at both compile and runtime.
   ;; Doom's minimum supported version of Emacs is 27.1. Its my goal to support
   ;; one major version below the stable release, for about a year or until
@@ -160,7 +161,8 @@
 
 (defgroup doom nil
   "An Emacs framework for the stubborn martian hacker."
-  :link '(url-link "https://doomemacs.org"))
+  :link '(url-link "https://doomemacs.org")
+  :group 'emacs)
 
 (defconst doom-version "3.0.0-pre"
   "Current version of Doom Emacs core.")
@@ -677,7 +679,7 @@ but long before your modules and $DOOMDIR/config.el are loaded."
 (defcustom doom-after-init-hook ()
   "A hook run once Doom's core and modules, and the user's config are loaded.
 
-This triggers at the absolutel atest point in the eager startup process, and
+This triggers at the absolute latest point in the eager startup process, and
 runs in both interactive and non-interactive sessions, so guard hooks
 appropriately against `noninteractive' or the `cli' context."
   :group 'doom

lisp/lib/system.el

@@ -82,6 +82,7 @@
 (defun doom-system-cpus ()
   "Return the max number of processing units on this system.
 Tries to be portable. Returns 1 if cannot be determined."
+  ;; REVIEW: Replace with `num-processors' once 27.x support is dropped.
   (with-memoization (get 'doom-system-cpus 'cached-value)
     (if (fboundp 'num-processors)
         (num-processors) ; added in Emacs 28.1