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

[Van Ly <van.ly@sdf.org>]

On Mon, 10 Jan 2022, Eli Zaretskii wrote:

>> 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.
>

Yes, I know.  Emacs unboxes with unpleasant defaults.  I was 
pleasantly surprised TAB expands and collapses the bullet point in 
Outline View mode.  If memory serves.  I used to have to look up 
how to do that.  What key to use.  Maybe the TAB behavior was 
pulled from Org mode to Outline mode.  Having the same key to expand, 
collapse the bullet point headline is the "Right thing to do(R)[TM]".

Perhaps, there could be configuration infrastructure policy overlay 
for having bullet points expand, collapse with the same key.  I would 
use that to page up/down View mode with B and SPC everywhere.

possible expand, collapse keybindings for bullet point headline
* TAB
* RET
* SPC

CORRECTION
> steps to reproduce in Git-Log-View mode
> * open emacs by 'emacs -Q'
> * goto emacs source directory
   * apply C-x v L runs the command vc-print-root-log
> * goto the first line with a bullet point
> * goto A and perform TAB, RET

-- 
vl