bug#75345: 29.4; 'insert' doc string still mentions 'string-as-multibyte'

[Eli Zaretskii <eliz@gnu.org>]

> From: Ulrich Müller <ulm@gentoo.org>
> Date: Sat, 04 Jan 2025 10:50:04 +0100
> 
> C-h f insert RET
> 
>    insert is a built-in function in ‘src/editfns.c’.
> 
>    [...]
> 
>    When operating on binary data, it may be necessary to preserve the
>    original bytes of a unibyte string when inserting it into a multibyte
>    buffer; to accomplish this, apply ‘string-as-multibyte’ to the string
>    and insert the result.
> 
> C-h f string-as-multibyte RET
> 
>    string-as-multibyte is a built-in function in ‘src/fns.c’.
> 
>    This function is obsolete since 26.1; use `decode-coding-string'.
> 
>    [...]
> 
> This looks inconsistent, presumably 'insert' shouldn't mention
> 'string-as-multibyte'. Attached patch updates the doc string.

Thanks, installed on emacs-30, and closing the bug.

> Also, the elisp manual still mentions functions string-as-unibyte and
> string-as-multibyte in section "(elisp) Top > Non-ASCII Characters >
> Selecting a Representation". Should these be removed from the manual,
> or at least be labelled as obsolete?

I'm not yet convinced these functions should be removed from the
manual.