index.html.md:318: Clean up PDD section of documentation

[0pdd]

The puzzle 48-f613bc13 from #48 has to be resolved:

the-heroes-journey/source/index.html.md

Line 318 in 2287ad5

@todo #48:15mins Clean up PDD section of documentation

The puzzle was created by @raboley on 07-Jul-20.

Estimate: 15 minutes, role: DEV.

If you have any technical questions, don't ask me, submit new tickets instead. The task will be "done" when the problem is fixed and the text of the puzzle is removed from the source code. Here is more about PDD and about me.