Smartdict test: [TDD] Smartdicts should not share state.
Smartdict: Smartdicts should not share state.
Smartdict test: [TDD] Ensure getKey uses the default argument.
Smartdict: Ensure getKey uses the default argument.

This bug was found by running `pychecker` on the soure code.
Merge pull request #74 from Renelvon/smartdict_fixes

Smartdict fixes