Add the highlight-indentation module

This is extremely useful for Python development; i wonder why i didn’t have it before.

configuration.org

@@ -2733,6 +2733,14 @@ Intended as a value for `bug-referecne-url-format'."
   (prog-mode . bug-reference-prog-mode))
 #+END_SRC
 
+** Highlight indentation
+
+#+begin_src emacs-lisp
+(use-package highlight-indentation
+  :hook
+  (python-mode . highlight-indentation-mode))
+#+end_src
+
 * Python related setup and ~use-package~ calls
 
 Because, well, that’s my job now.  Of course it gets a dedicated section.