bug#34055: 27.0.50; Documentation of `visited-file-modtime' is inconsistent

[Eli Zaretskii]

> From: "N. Jackson" <nljlistbox2@gmail.com>
> Date: Sat, 12 Jan 2019 20:36:33 -0500
> 
> 
> In the Elisp manual (info "(elisp)Modification Time") the
> documentation of `visited-file-modtime' is inconsistent with its doc
> string.
> 
> The Elisp manual says
> 
>   If the buffer is not visiting a file, this function returns −1.
> 
> However, it appears (IIUC) that the function only returns -1 when
> the buffer _is_ visiting a file and that file does not exist; the
> doc string has it right.
> 
> [This was reported in [1] but it remains unfixed in current master.]

Thanks, fixed.