bug#30103: docstring of read-only-mode doesn't seem to address most simplest case

[Lars Ingebrigtsen]

積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

> The following docstring
> -------------
> read-only-mode is an interactive compiled Lisp function in
> ‘simple.el’.
>
> It is bound to C-x C-q.
>
> (read-only-mode &optional ARG)
>
> Change whether the current buffer is read-only.
> With prefix argument ARG, make the buffer read-only if ARG is
> positive, otherwise make it writable.
> -------------
> doesn't seem to address the case
> where one just does
> M-x read-only-mode
> which indeed makes the buffer read-only.

The first line of the doc string says what it does?  "Change whether the
current buffer is read-only."  

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