bug#47416: Strange sentence in documentation of 'insert-file-contents'

[Gregory Heytings]

> The last paragraph/sentence in the documentation of 
> 'insert-file-contents' is:
>
> > In addition, this function decodes the inserted text from known formats 
> > by calling `format-decode', which see.
>
> It looks like there is something wrong about this sentence.
>
> "... which see." — See what?
>
> The sentence was introduced by commit bb085aed9593 (2012-12-21).

See the Emacs manual Glossary: q.v. Short for "quod vide" in Latin, which 
means "which see".  There are about 400 occurrences of "which see" in the 
Emacs documentation, it means "look at the documentation of the previous 
word/function to find more information".