Docs: Add code-block wrappers to code examples in style_guide (#78970)

* Docs: Add code-block wrappers to code examples in style_guide
List of changed files:
- docs/docsite/rst/dev-guide/style_guide/index.rst
- docs/docsite/rst/dev-guide/style_guide/basic_rules.rst

docs/docsite/rst/dev_guide/style_guide/basic_rules.rst

@@ -61,7 +61,9 @@ For menu procedures, bold the menu names, button names, and so on to help the us
 3. In the **Open** dialog box, click **Save**.
 4. On the toolbar, click the **Open File** icon.
 
-For code or command snippets, use the RST `code-block directive <https://www.sphinx-doc.org/en/1.5/markup/code.html#directive-code-block>`_::
+For code or command snippets, use the RST `code-block directive <https://www.sphinx-doc.org/en/1.5/markup/code.html#directive-code-block>`_:
+
+.. code-block:: rst
 
    .. code-block:: bash
 

docs/docsite/rst/dev_guide/style_guide/index.rst

@@ -192,7 +192,9 @@ Adding anchors
 
 * Include at least one anchor on every page
 * Place the main anchor above the main header
-* If the file has a unique title, use that for the main page anchor::
+* If the file has a unique title, use that for the main page anchor:
+
+.. code-block:: text
 
    .. _unique_page::