distutils; this section explains building extension modules only.
It is common to pre-compute arguments to :func:`setup`, to better structure the
-driver script. In the example above, the\ ``ext_modules`` argument to
+driver script. In the example above, the ``ext_modules`` argument to
:func:`setup` is a list of extension modules, each of which is an instance of
the :class:`~distutils.extension.Extension`. In the example, the instance
defines an extension named ``demo`` which is build by compiling a single source