Added missing end double quotes as noted in (a.o.) overnight documentation build: https://cgal.geometryfactory.com/CGAL/Manual_doxygen_test/CGAL-6.2-I-22/index.html
Added missing end double quotes as noted in (a.o.) overnight documentation build: https://cgal.geometryfactory.com/CGAL/Manual_doxygen_test/CGAL-6.2-I-22/index.html