Major optimization refactor, across the board

+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
  startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
  cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
  various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
  in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
  window-setup hooks; a customization opportunity for users + ensures
  custom functionality won't interfere with startup.

modules/tools/gist/config.el

@@ -1,4 +1,4 @@
-;;; tools/gist/config.el
+;;; tools/gist/config.el -*- lexical-binding: t; -*-
 
 ;; NOTE On occasion, the cache gets corrupted, causing wrong-type-argument
 ;; errors. If that happens, try `+gist/kill-cache'. You may have to restart
@@ -12,9 +12,8 @@
   ;; evil-ify gist listing
   (set! :evil-state 'gist-list-mode 'normal)
 
-  (when (bound-and-true-p shackle-mode)
-    (defun +gist*list-render (orig-fn &rest args)
-      (funcall orig-fn (car args) t)
-      (unless (cadr args)
-        (doom-popup-buffer (current-buffer))))
-    (advice-add #'gist-list-render :around #'+gist*list-render)))
+  (defun +gist*list-render (orig-fn &rest args)
+    (funcall orig-fn (car args) t)
+    (unless (cadr args)
+      (doom-popup-buffer (current-buffer))))
+  (advice-add #'gist-list-render :around #'+gist*list-render))