- Drop the 1-argument QString constructor, it is suprising
- Drop the conversion to QString
- Add a toString() instead
- Drop tests for the removed API
- While here, apply code formatting to the tests
This is done to force consumers to update to strongly-typed
InstanceKeys.
- cover all the constructors
- Start with some tests that fail, showing bugs in the implementation
- Fix bug that "derp@derp" was creating a valid instance-key with
a bad module and id (need to use ::fromString() to get that
functionality).
- Extend tests with more bad cases.
- Refactor tests to simplify "this is bad" assertions.
