Explain meaning of asterisk in heading titles

[arthur-tacca]

A lot of the headings end in a asterisk e.g. "First things first! *" does but "Strings can be tricky sometimes" does not. This suggests a footnote but after quite a bit of searching I can't find one. Perhaps it means something else like "new" or "reader contributed". Please explain on the page otherwise there's not much point it being there and it's a bit frustrating.

[satwikkansal]

Those were included for the returning readers whenever a major update was released. A quick way for them to just go over what's updated (and new) instead of going over the whole project again. This is mentioned in the released notes.

Please explain on the page otherwise there's not much point it being there and it's a bit frustrating.

I see, I'll update it in the main page.