Added newlines to lesson 7 keyword categorization.
Added newlines to lesson 7 keyword categorization.

PyClass/PyClassLessons,razzius/PyClassLessons,razzius/PyClassLessons,noisebridge/PythonClass,noisebridge/PythonClass,razzius/PyClassLessons,noisebridge/PythonClass,razzius/PyClassLessons,PyClass/PyClassLessons,PyClass/PyClassLessons,noisebridge/PythonClass