Jeff King [off-list ref] writes:
We should also consider briefly whether anybody is relying on --oneline
for machine parsing. I think "log --oneline" is fair game, but I wonder
if people calling "rev-list --decorate --oneline" should be considered.
It seems kind of unlikely to me, considering that the decorate output is
ambiguous to parse anyway (if you see parentheses, you cannot tell if it
is decorate output or part of the commit subject).
Yeah, I do not think it is likely. Among the in-tree scripts,
git-stash does use rev-list --oneline but the purpose of the call
exactly is to grab a human readable one line summary, and it will be
happy with any change to make --oneline more human readble.
t4202 has many invocations of "log --oneline --decorate", though;
these things do get tested.