sublist: Adding test for unique return values
sublist: Adding test for unique return values

behrtam/xpython,rootulp/xpython,mweb/python,smalley/python,exercism/python,N-Parsons/exercism-python,behrtam/xpython,exercism/xpython,exercism/xpython,exercism/python,rootulp/xpython,smalley/python,mweb/python,jmluy/xpython,pheanex/xpython,jmluy/xpython,pheanex/xpython,N-Parsons/exercism-python