Re: [PATCH v4] ref-filter: fallback on alphabetical comparison

> In ref-filter.c the comparison of refs while sorting is handled by
> cmp_ref_sorting() function. When sorting as per numerical values
> (e.g. --sort=objectsize) there is no fallback comparison when both
> refs hold the same value. This can cause unexpected results (i.e. the
> order of listing refs with equal values cannot be pre-determined) as
> pointed out by Johannes Sixt ($gmane/280117).
>
> Hence, fallback to alphabetical comparison based on the refname
> whenever the other criterion is equal.
>
> A test in t3203 was expecting that branch-two sorts before HEAD, which
> happened to be how qsort(3) on Linux sorted the array, but (1) that
> outcome was not even guaranteed, and (2) once we start breaking ties
> with the refname, "HEAD" should sort before "branch-two" so the
> original expectation was inconsistent with the criterion we now use.
>
> Update it to match the new world order, which we can now depend on
> being stable.