Improve output for times verification failures

[searls]

See this test:

      context '1 time, unsatisfied (with 2)', ->
        When -> @testDouble()
        And -> @testDouble()
        Then -> shouldThrow (=> td.verify(@testDouble(), times: 1)), """
          Unsatisfied verification on test double.

            Wanted:
              - called with `()` 1 time.

            But was actually called:
              - called with `()`.
              - called with `()`.
          """

I'd rather see it end with:

          """
            But was actually called:
              - called with `()` 2 times.
          """

This would require some care to make sure we account for matchers of different types of calls when we compare and print the actuals (since if the matchers satisfy they'll 'look' the same to the lib. We'd need a way to disable matchers for this purpose)

[searls]

This will be resolved indirectly via #161, tracking it there