Fix namespace

Mesh_2/doc/Mesh_2/CGAL/IO/write_VTU.h

@@ -33,6 +33,7 @@ void write_VTU(std::ostream& os,
 //!
 //! \param os the stream used for writing.
 //! \param tr the triangulated domain to be written.
+//! \param ipm the property map storing if a face is in the domain.
 //! \param mode decides if the data should be written in binary (`BINARY`)
 //!             or in \ascii (`ASCII`).
 //!

Mesh_2/include/CGAL/IO/write_VTU.h

@@ -405,7 +405,7 @@ void write_VTU(std::ostream& os,
                const CDT& tr,
                Mode mode = BINARY)
 {
-  internal::In_domain<CDT> in_domain;
+  CGAL::internal::In_domain<CDT> in_domain;
   write_VTU(os, tr, in_domain, mode);
 }