Reindented, and fixed some validation errors

For some reason, there's an extra p tag, and I can't find where the hell
it is.
Validated index.html
Validated beginner.html

The issue was that you can't have a p dictionary list within a p tag. In
fact, you can't have any type of list within a p tag. It's just not
valid. W3 says it's good now though.