Re: master 127ab231be 1/2: Attempt to clarify Input Focus documentation

[Gregory Heytings]

> > +This function is called with no arguments when Emacs notices that a
> > +frame may have gotten or lost focus.  Focus events are delivered
>
> "the focus may have moved to or from the frame." is how it usually 
> written in X documentation, and I think that is a little clearer.
>
> Also, why not add the following as well:
>
> when no window manager is running, or inside child frames, the focus can 
> also be set "implicitly" by the mouse pointer entering a frame.

There are other cases, though, such as window managers using a 
focus-follows-mouse policy.