bug#53158: 28.0.90; TAB, RET key behave differently for Git-Log-View, Outline View mode

[Eli Zaretskii]

> Date: Mon, 10 Jan 2022 14:20:25 +0000 (UTC)
> From: Van Ly <van.ly@sdf.org>
> 
> observed behavior
> * TAB, RET key behave differently for expanding and collapsing the bullet 
> point in the two modes
> 
> expected behavior
> * TAB, RET key behave consistently on bullet point headlines across the two 
> modes

There's absolute no guarantee in Emacs that a key behaves the same in
tow different modes.  Even if those two modes can be argued to be
similar in some sense.