Several fixes

- Prettier output (for example, fixed so that the output looks more like the code you write, avoiding extra newlines at the end of the pre-block in some cases)
- Fixed // SECTION sections. They used to output the headers below the sections instead of above where you write them.
- Show total number of tests while running tests
- Continuations for expected output (fixes  #31)
- Switch to class="test" instead of class="commenttest" (fixes #22)