1 adding a

     2 adding b/a

     3 a

     4 b/a

     5 644 a

     6 644 b/a

     7 b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644 a

     8 b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644 b/a

     9 a

    10 a

    11 b/a

    12 a

    13 b/a

    14 % should fail

    15 abort: unknown revision '2'!

    16 abort: please specify just one revision

    17 a

    18 b/a