docs: fix doc for registerUtilMethod; style tweak for internal docs.

Pul the list pseudoheader style spacing tweat ot the stylesheet used
to generate the released docs.

Fix doc on arg to function defined with registerUtilMethod.

Author: rouilj

doc/reference.txt

@@ -1151,8 +1151,8 @@ mechanism.
   <customizing.html#adding-a-time-log-to-your-issues-4>`_ for an example)
 
 * ``instance.registerUtilMethod`` is also used for adding `templating
-  utilities`_, and provides a client instance by default to the
-  function. This makes more complex templating actions easier to
+  utilities`_, and provides a TemplatingUtils instance by default to
+  the function. This makes more complex templating actions easier to
   use. (see :ref:`dynamic_csp` for an example)
 
 * ``instance.registerAction`` is used to add more actions to the

website/www/_static/style.css

@@ -51,6 +51,15 @@
 
 * + * { margin-block-start: 1.2em;}
 
+/* shrink spacing between first and following paragraph in a list item
+   when the first paragraph is bold/strong. Try to tie the first paragraph
+   pseudo header closer to the following paragraph. */
+li > p:has(strong):first-child
+ {
+    /* background: red; */
+    margin-block-end: -0.75em;
+}
+
 /* shrink spacing between list elements in tables of contents,
    badge displays */
 div.toctree-wrapper * + *, div.contents * + *, div.release_info * {