Make smaller source blocks

README.org

@@ -858,8 +858,11 @@ Stolen from [[https://git.sr.ht/~bzg/org-contrib/tree/master/item/lisp/ox-extra.
                      (cl-mapcan (lambda (s) (org-element-contents s))
                                 (cdr sections)))
               (mapc #'org-element-extract-element (cdr sections)))))
-        info))
+        info)))
+#+end_src
 
+#+begin_src emacs-lisp
+  (with-eval-after-load 'ox
     (defun org-latex-header-blocks-filter (backend)
       "Convert marked LaTeX export blocks to \"#+latex_header: \" lines.
   The marker is a line \"#+header: :header yes\" preceding the block.
@@ -898,8 +901,11 @@ Stolen from [[https://git.sr.ht/~bzg/org-contrib/tree/master/item/lisp/ox-extra.
                 ;; Reverse to go upwards to avoid wrecking the list of
                 ;; block positions in the file that would occur in case
                 ;; of going downwards.
-                (reverse blocks)))))
+                (reverse blocks))))))
+#+end_src
 
+#+begin_src emacs-lisp
+  (with-eval-after-load 'ox
     (defun my-activate-buffer-local-org-export-filters ()
       "Activate my export filters locally in the current buffer."
       (interactive)