On Ask Ubuntu we have a lot of questions and answers that include multiple lines of terminal output which is best handled by using code fences. Without formatting, this information is difficult to parse and it makes the content much more difficult to read.
Currently our community "Markdown help" page has the instructions for how to use code fences hidden behind a "show more" link.
My primary suggestion is that that we do away with the "show more" link so that this information is not hidden by default. This will make the information more readily accessible. Otherwise, it is very easy to miss.
The help page could be improved further if we could also show examples of the rendered output after the example markdown input, similar to our "Formatting" help page.
Ideally, I think that these two different help pages should eventually be consolidated. Several items are duplicated on both pages and it would be more consistent to have a single page for formatting and markdown help and examples.