(#1899 also concerns a global whitespace policy change involving newlines.)

Editorial teleconference: No consensus.

See also #2110.

Editorial meeting: For long \item, add an empty line in front and after.
Do not indent \item. Break after \item unless all of the bullets are very short.
Keep it as rough guidance, don't mass-update the source code.
Update the formatting wiki write-up accordingly.

Update the formatting wiki write-up accordingly.

Please, do.

Update the formatting wiki write-up accordingly.

Please, do.

Yes please! It's not clear to me what is expected for the long items - fixing the wiki would make this clear. From "For long \item, add an empty line in front and after", we'll have empty lines after the \begin{itemize} and before the \end{itemize}, often resulting in a \begin{itemize} or \end{itemize} statement having an empty line both before and after it which seems odd, is that what we want? Perhaps we should instead have an empty line before the \begin{itemize} (except when starting a paragraph) and after the \end{itemize}? Example:

\pnum
Blah blah blah...
Blah blah:

\begin{itemize}
\item
A multi-line text.

\item
Another multi-line text.
\end{itemize}

Blah blah blah...

Hope folks won't mind if I follow my suggestion until I hear otherwise.

Perhaps we should instead have an empty line before the \begin{itemize} (except when starting a paragraph) and after the \end{itemize}

When the list is part of a sentence, inserting empty lines around the list breaks the sentence, which breaks sentence linking on eel.is/c++draft. See #1899.