"changed on disk" revert-buffer help text?

[Bob Proulx <bob@proulx.com>]

Here is a very minor wording issue that makes me question what I think
I know.  Is it a wording problem?  Or is something more deep happening?

I often run into this when editing a file in a git repository and then
doing something with git such as switching branches or something.  In
that case the file is modified outside of emacs and emacs is detecting
and reporting this when I attempt to change the buffer.

The minibuffer correctly tells me of this case:

  myfile changed on disk; really edit the buffer? (y, n, r or C-h)

Then because I want help I C-h to print the associated help:

  You want to modify a buffer whose disk file has changed
  since you last read it in or saved it with this buffer.

  If you say `y' to go ahead and modify this buffer,
  you risk ruining the work of whoever rewrote the file.
  If you say `r' to revert, the contents of the buffer are refreshed
  from the file on disk.
  If you say `n', the change you started to make will be aborted.

  Usually, you should type `n' and then `\[revert-buffer]',
  to get the latest version of the file, then make the change again.

The 'r' command conveniently allows me to revert-buffer, usually what
I want to do, and then modify it.  That's great.

But then that last paragraph says, "Usually, you should type `n' and
then `\[revert-buffer]', to get the latest version of the file, then
make the change again."  Isn't that exactly what the 'r' command does?
Why isn't, "Usually you should type `r' to `\[revert-buffer]' to get
the latest version of the file, then make the change again." the text
there?  Is there some deeper something that is happening with 'r' that
is hinted at there that means we wouldn't want to "usally" use it?

Thanks,
Bob