Example of styling for grader response

- Adds \<small\> tag around row counts
- Swaps "Your Results" and "Expected Results" ("Your Results" first)
- Makes error headings red
- Adds static dummy list of hints to demonstrate style
- Adds \<pre\> around query code blocks to handle wrapping

Note: To play nicely with edX style, custom CSS is avoided. Inline CSS is used to ensure priority.