bug#33339: 26; doc string of `write-file`

[Drew Adams]

> >  "If you specify just a directory name as FILENAME, that means to use
> >   the default file name but in that directory.  You can also yank
> >   the default file name into the minibuffer to edit it, using M-n."
> >
> > "The default file name" is undefined.
> 
> It is defined by the very next paragraph of the doc string.

Yes, things are out of order.

> I made it even more clear.

Thank you.

> > To start with, the doc string should say that it prompts for a file
> > name.  If the current buffer is visiting a file then that file's name
> > is the default file name for reading.  Otherwise the buffer name is the
> > default file name for reading.
> 
> This is incorrect when the user specifies just the directory name at
> the prompt.  I clarified that only the base name is taken from the
> buffer.

Thanks.