Re: [PATCH 4/6] t/t5528-push-default: generalize test_push_*

> On Mon, Jun 24, 2013 at 9:28 AM, Junio C Hamano <gitster@pobox.com> wrote:
>> Johan Herland <johan@herland.net> writes:
>>
>>>> +       git --git-dir="${3:-repo1}" log -1 --format='%h %s' "$2" >actual &&
>>>
>>> Isn't  ${3:-repo1} a bashism?
>>
>> I do not think so.  But now I looked at it again, I think I would
>> use ${3-repo1} form in this case myself.  No caller passes an empty
>> string to the third place.
>
> Ok, I have to admit that I'm not at all sure where the line between sh
> and bash goes when it comes to ${magic}... Is there any good
> documentation on what is in sh and what is not?