* Explain how to use STORE_SETUPS and PRINT_SETUPS
I found the instructions a little terse, but managed.
This also adds a note about PRINT_SETUPS reporting random numbers if STORE_SETUPS hasn't been used.
* Remove line breaks
Existing docs seem to use a mix of hard line breaks at sentence
ends, or 80 chars-ish, versus no line breaks in paragraphs.
* Suggestion during review
Co-authored-by: フィルターペーパー <76888457+filterpaper@users.noreply.github.com>
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Co-authored-by: フィルターペーパー <76888457+filterpaper@users.noreply.github.com>