unittest for chap 2 quiz 3
	new file:   exercises/chap2/q0003.py
	new file:   tests/chap2/q0003.py
Merge branch 'upstream'
typo buff->buzz
slicing bug in q0003.py
	modified:   exercises/chap2/q0002.py
	modified:   tests/chap2/q0002.py
	modified:   tests/chap2/q0003.py
Merge branch 'upstream'

Conflicts:
	exercises/chap2/q0002.py