bug#52202: 29.0.50; try-completion, all-completions support for a list of strings COLLECTION is not documented in their docstrings

[Matt Armstrong]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Matt Armstrong <matt@rfc20.org> writes:
>
>> Then I realized that the lisp reference manual is in good shape.  This
>> patch copies text almost verbatim from it.  So, the diff is both large
>> but hopefully not hard to verify in review.
>
> In these cases, we usually just say "See (elisp)Section" in the doc
> strings, and leave the description of the complex data structures to
> the manual.

I can see it both ways.

Eli suggested that a complete docstring would be more handy (up thread),
and I now think this might be achievable with simpler edits, so absent a
different consensus I'll go that direction for now.