test cleanup, include a test for cython.set

tests/run/set.pyx

-__doc__ = u"""
->>> type(test_set_literal()) is _set
-True
->>> sorted(test_set_literal())
-[u'a', u'b', 1]
-
->>> type(test_set_add()) is _set
-True
->>> sorted(test_set_add())
-[u'a', 1]
-
->>> type(test_set_list_comp()) is _set
-True
->>> sorted(test_set_list_comp())
-[0, 1, 2]
-
->>> type(test_set_clear()) is _set
-True
->>> list(test_set_clear())
-[]
-
->>> type(test_set_pop()) is _set
-True
->>> list(test_set_pop())
-[]
-
->>> type(test_set_discard()) is _set
-True
->>> sorted(test_set_discard())
-[u'12', 233]
-"""
-
-import sys
-if sys.version_info[0] >= 3:
-    __doc__ = __doc__.replace(u"u'", u"'").replace(u'u"', u'"')
 
 # Py2.3 doesn't have the 'set' builtin type, but Cython does :)
 _set = set
 
+cimport cython
+
+def cython_set():
+    """
+    >>> cython_set() is _set
+    True
+    """
+    assert set is cython.set
+    return cython.set
+
 def test_set_literal():
-    cdef set s1 = {1,u'a',1,u'b',u'a'}
+    """
+    >>> type(test_set_literal()) is _set
+    True
+    >>> sorted(test_set_literal())
+    ['a', 'b', 1]
+    """
+    cdef set s1 = {1,'a',1,'b','a'}
     return s1
 
 def test_set_add():
+    """
+    >>> type(test_set_add()) is _set
+    True
+    >>> sorted(test_set_add())
+    ['a', 1]
+    """
     cdef set s1
     s1 = set([1])
     s1.add(1)
-    s1.add(u'a')
+    s1.add('a')
     s1.add(1)
     return s1
 
 def test_set_clear():
+    """
+    >>> type(test_set_clear()) is _set
+    True
+    >>> list(test_set_clear())
+    []
+    """
     cdef set s1
     s1 = set([1])
     s1.clear()
     return s1
 
 def test_set_list_comp():
+    """
+    >>> type(test_set_list_comp()) is _set
+    True
+    >>> sorted(test_set_list_comp())
+    [0, 1, 2]
+    """
     cdef set s1
     s1 = set([i%3 for i in range(5)])
     return s1
 
 def test_set_pop():
+    """
+    >>> type(test_set_pop()) is _set
+    True
+    >>> list(test_set_pop())
+    []
+    """
     cdef set s1
     s1 = set()
-    s1.add(u'2')
+    s1.add('2')
     two = s1.pop()
     return s1
 
 def test_set_discard():
+    """
+    >>> type(test_set_discard()) is _set
+    True
+    >>> sorted(test_set_discard())
+    ['12', 233]
+    """
     cdef set s1
     s1 = set()
-    s1.add(u'12')
+    s1.add('12')
     s1.add(3)
     s1.add(233)
-    s1.discard(u'3')
+    s1.discard('3')
     s1.discard(3)
     return s1