Fixed small formatting issues.

docs/examples/tutorial/external/atoi.pyx

 from libc.stdlib cimport atoi
 
-cdef parse_charptr_to_py_int(char*s):
+cdef parse_charptr_to_py_int(char* s):
     assert s is not NULL, "byte string value is NULL"
     return atoi(s)  # note: atoi() has no error detection!

docs/examples/userguide/wrapping_CPlusPlus/Rectangle.pxd

@@ -8,5 +8,5 @@ cdef extern from "Rectangle.h" namespace "shapes":
         Rectangle(int, int, int, int) except +
         int x0, y0, x1, y1
         int getArea()
-        void getSize(int*width, int*height)
+        void getSize(int* width, int* height)
         void move(int, int)