This commit adds tests for a struct which has an embedded struct pointer
and a field that is a pointer to the same object. This ensures the cycle
detection is properly reset between fields.
Previously, the tests did not include maps with more than a single entry
since the iteration order is randomized and the tests only accepted a
single valid expected value. This commit modifies the tests to accept
multiple valid expected values and adds tests for a multi-entry map to
both Dump and Formatter.
Dave Collins