new test case for flattened 'in' tests

tests/run/flatin.pyx

+__doc__ = u"""
+>>> test_in('ABC')
+1
+>>> test_in('abc')
+2
+>>> test_in('X')
+3
+>>> test_in('XYZ')
+4
+>>> test_in('ABCXYZ')
+5
+>>> test_in('')
+5
+
+>>> test_not_in('abc')
+1
+>>> test_not_in('CDE')
+2
+>>> test_not_in('CDEF')
+3
+>>> test_not_in('BCD')
+4
+"""
+
+def test_in(s):
+    if s in ('ABC', 'BCD'):
+        return 1
+    elif s.upper() in ('ABC', 'BCD'):
+        return 2
+    elif len(s) in (1,2):
+        return 3
+    elif len(s) in (3,4):
+        return 4
+    else:
+        return 5
+
+def test_not_in(s):
+    if s not in ('ABC', 'BCD', 'CDE', 'CDEF'):
+        return 1
+    elif s.upper() not in ('ABC', 'BCD', 'CDEF'):
+        return 2
+    elif len(s) not in [3]:
+        return 3
+    elif len(s) not in [1,2]:
+        return 4
+    else:
+        return 5