Re: [PATCH v2 1/2] Add test to describe expectation of blame --reverse with branched history

> Let me try.
> 
>  (1) for merges, an edge with '*' denotes the one to the first
>      parent.
>  (2) a commit that touches file.t are in capital
> 
>            c1---a3
>           /    *
>          /    /
>    A0---a1--*a2
>      \      /
>       b1---B2
> 
> Did I draw it correctly?

>> +test_expect_failure 'blame --reverse finds B1, not C1' '
>> +	git blame --porcelain --reverse A0..A3 -- file.t >actual_full &&
>> +	head -1 <actual_full | sed -e "sX .*XX" >actual &&
> 
> "head -n 1" is more POSIXy way to spell this.
> 
> Don't get cute with sXXX in sed script when the usual s/// suffices;
> the only effect of the cuteness is to waste readers' time, who have
> to wonder if there is something interesting going on.