bug#3931: 23.0.96; doc of select-frame-set-input-focus and select-frame

[Drew Adams]

> > Doc string of `select-frame-set-input-focus':
> > "If `mouse-autoselect-window' is non-nil, also move mouse cursor to
> > FRAME's selected window.  Otherwise, if `focus-follows-mouse' is
> > non-nil, move mouse cursor to FRAME."
> >  
> > Why "Otherwise"? 
> 
> Because the value of `focus-follows-mouse' is only checked if
> `mouse-autoselect-window' is nil.

OK, in that case the text is correct. But it could easily be misread by some
users. It would be clearer to state this explicitly: "If
`mouse-autoselect-window' is nil and `mouse-autoselect-window' is non-nil, then
move the mouse pointer to FRAME."

And it wouldn't hurt to state this explicitly also:
"Otherwise, do not move the mouse pointer."

> > Similar problems exist for the description in the Elisp manual (the
> > text is almost the same).  In addition, the manual should say
> > something more about the differences between these two 
> functions, and
> > mention when you might use one or the other.
> 
> I don't know how to fix the Elisp manual.

Hopefully, someone else does. ;-)

Thx.