Typos and added a note concerning the paths when using the distutils directives.

docs/examples/userguide/wrapping_CPlusPlus/example_usage.py

-import rect
-
-x0, y0, x1, y1 = 1, 2, 3, 4
-
-rect_obj = rect.PyRectangle(x0, y0, x1, y1)
-print(dir(rect_obj))

docs/src/userguide/wrapping_CPlusPlus.rst

@@ -174,13 +174,19 @@ To compile a Cython module, it is necessary to have a :file:`setup.py` file:
 
 .. literalinclude:: ../../examples/userguide/wrapping_CPlusPlus/setup.py
 
-Run ``$python setup.py build_ext --inplace``
+Run ``$ python setup.py build_ext --inplace``
 
-Create :file:`test_import.py`:
+To test it, open the Python interpreter::
 
-.. literalinclude:: ../../examples/userguide/wrapping_CPlusPlus/example_usage.py
+    >>> import rect
+    >>> x0, y0, x1, y1 = 1, 2, 3, 4
+    >>> rect_obj = rect.PyRectangle(x0, y0, x1, y1)
+    >>> print(dir(rect_obj))
+    ['__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__',
+     '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__',
+     '__lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__',
+     '__setstate__', '__sizeof__', '__str__', '__subclasshook__', 'get_area', 'get_size', 'move']
 
-You can now test your wrapper with ``$python test_import.py``.
 
 Advanced C++ features
 ======================
@@ -591,7 +597,7 @@ possible to declare them in the :file:`setup.py` file::
 
 Cython will generate and compile the :file:`rect.cpp` file (from
 :file:`rect.pyx`), then it will compile :file:`Rectangle.cpp`
-(implementation of the ``Rectangle`` class) and link both objects files
+(implementation of the ``Rectangle`` class) and link both object files
 together into :file:`rect.so`, which you can then import in Python using
 ``import rect`` (if you forget to link the :file:`Rectangle.o`, you will
 get missing symbols while importing the library in Python).
@@ -635,6 +641,12 @@ any source code, to compile it in C++ mode and link it statically against the
    # distutils: language = c++
    # distutils: sources = Rectangle.cpp
 
+.. note::
+
+     When using distutils directives, the paths are relative to the working
+     directory of the distutils run (which is usually the
+     project root where the :file:`setup.py` resides).
+
 To compile manually (e.g. using ``make``), the ``cython`` command-line
 utility can be used to generate a C++ ``.cpp`` file, and then compile it
 into a python extension.  C++ mode for the ``cython`` command is turned