If ConfigState.SortKeys is true, then dump and format will sort map keys
before displaying them. Only native types (bool, ints, uint, uintptr,
string) are supported, other slices are left unchanged.
The motivation is to have more diffable output, mostly for test purpose.
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.
Patrick Mezard
Dave Collins