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

[Juri Linkov]

>> Then you can choose: when point is at the beginning of the outline heading,
>> TAB can expand and collapse outlines, when point is not at the line 
>> beginning,
>> TAB moves to the next hunk.
>
> FWIW, I consider this not a good UI.  Having point one column to the
> left or to the right of where you want to be is quite frequent, so
> making a key sequence produce a very different effect depending on
> that is far from being the best idea, IMO.

Of course, it's not a good UI - it's a trade-off.

> To me, this tells that these two modes, and the user expectations and
> habits to go with them, are simply incompatible, and we shouldn't try
> mixing them.  If someone wants a diff-mode-like outline mode, let's
> make such a mode, and leave the original diff-mode alone.

This problem is not specific to diff-mode.