If you think you're going to use <pre> tags — don't!
Use <code> tags instead! This applies to data as well as code.
Outside of code tags, you may need to use entities for some characters:
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
See Writeup Formatting Tips and other pages linked from there for more info.