Fixing PolyLine.

src/Cxx.md

src/Cxx/GeometricObjects/Hexahedron.cxx

src/Cxx/GeometricObjects/Point.cxx

src/Cxx/GeometricObjects/PolyLine.cxx

src/Cxx/GeometricObjects/PolyLine1.cxx

src/Python.md

src/Python/GeometricObjects/Point.py

src/Python/GeometricObjects/PolyLine.md

src/Python/GeometricObjects/PolyLine.py

src/Python/GeometricObjects/PolyLine1.py

src/Python/GeometricObjects/Polyline.py