clean up test

tests/run/simpcall.pyx

-__doc__ = """
-    >>> z(1,9.2, b'test')
-"""
-
-import sys
-if sys.version_info[0] < 3:
-    __doc__ = __doc__.replace(u" b'", u" '")
+# mode: test
 
 def f(x, y):
     x = y
 
+
 cdef void g(int i, float f, char *p):
     f = i
 
+
 cdef h(int i, obj):
     i = obj
 
+
 def z(a, b, c):
+    """
+    >>> z(1,9.2, b'test')
+    """
     f(a, b)
     f(a, b,)
     g(1, 2.0, "spam")
     g(a, b, c)
 
+
 def fail0(a, b):
     """
     >>> fail0(1,2)
@@ -29,6 +30,7 @@ def fail0(a, b):
     """
     f()
 
+
 def fail1(a, b):
     """
     >>> fail1(1,2)
@@ -37,6 +39,7 @@ def fail1(a, b):
     """
     f(a)
 
+
 def failtype():
     """
     >>> failtype()