Diff rendering not working on ReStructuredText/Code/Codeblocks.html

[jonirouAtTalan]

On literalinclude section (https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/Reference/ReStructuredText/Code/Codeblocks.html#literalinclude) the diff rendering is not working

Current behavior

We don't see diff rendering

Expected behavior/output

We should see +/- sign and coloration

[linawolf]

It seems like this is currently not supported by the guides:

.. literalinclude:: /_CodeSnippets/LiteralIncludes/example.yaml :diff: /_CodeSnippets/LiteralIncludes/example_de.yaml