Revert Lisp indentation back to Emacs standard

With `common-lisp-indent-function`, the indentation of `while` was not
correct – oops.

This change will break some current indentations, though.  Stay tuned.

init.el

@@ -2691,7 +2691,7 @@ eventuelly be set to nil, however)."
 (use-package lisp-mode
   :mode (("\\.cl\\'" . lisp-mode)
          ("\\.lisp\\'" . lisp-mode))
-  :init (setq lisp-indent-function #'common-lisp-indent-function))
+  :init (setq lisp-indent-function #'lisp-indent-function))
 
 (use-package lispy
   :ensure t