It seems a lot of line breaks/paragraph breaks are missing from the HTML manual:

https://www.lexaloffle.com/dl/docs/pico-8_manual.html, version v0.2.2c9, seen 29-08-2021.

In many cases where the .TXT version of the manual lists items on separate lines, in the HTML version they are concatenated into a single paragraph. This makes it hard to read.

For example, this section:
https://www.lexaloffle.com/dl/docs/pico-8_manual.html#Extra_keys

I see this has been fixed in 2.4