sieve: Add parameter to exercise placeholder to fix #639
sieve: Add parameter to exercise placeholder to fix #639


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