* include/abg-diff-utils.h (end_of_frr_d_path_in_k_plus_delta):
Favour moving left when the two abscissas at the previous steps
are equal.
(compute_diff): Update the length of the shortest edit script when
the size of one of the inputs is zero.
* tests/test-core-diff.cc (in_out_spec): Add a new input to diff
two sequences for regression testing.
* tests/data/test-core-diff/report13.txt: New reference for
the comparison of the new regression test above.
Signed-off-by: Dodji Seketeli <dodji@redhat.com>
