fix level

Circular_kernel_3/doc/Circular_kernel_3/PackageDescription.txt

@@ -103,7 +103,7 @@
 - `CGAL::Line_arc_3<SphericalKernel>`
 - `CGAL::Circular_arc_3<SphericalKernel>`
 
-### Constants and Enumerations ###
+## Constants and Enumerations ##
 
 - `CGAL::Circle_type`
 

Kernel_23/doc/Kernel_23/PackageDescription.txt

@@ -497,7 +497,7 @@
 - `Kernel::SideOfOrientedCircle_2`
 - `Kernel::SideOfOrientedSphere_3`
 
-## Dimension handling tools ##
+## Dimension Handling Tools ##
 
 - `CGAL::Ambient_dimension<T, K>`
 - `CGAL::Feature_dimension<T, K>`

Periodic_3_mesh_3/doc/Periodic_3_mesh_3/PackageDescription.txt

@@ -42,7 +42,7 @@ flexibility that is offered in the \ref PkgMesh3 package.}
 \cgalPkgShortInfoEnd
 \cgalPkgDescriptionEnd
 
-### Relation to the 3D Mesh Generation and 3D Periodic Triangulations Packages ###
+\cgalHeading{Relation to the 3D Mesh Generation and 3D Periodic Triangulations Packages}
 
 A periodic mesh extends, by definition, infinitely in space. To avoid storing and
 manipulating duplicate points, well-chosen "dummy" points are inserted

Polyhedron/doc/Polyhedron/PackageDescription.txt

@@ -72,7 +72,7 @@ surface can be used without knowing the halfedge data structure.
 - \link PkgPolyhedronIOFunc `write_off()` \endlink   
 - \link PkgPolyhedronIOFunc `read_off()` \endlink
 
-### Draw a Polyhedron 3 ###
+## Draw a Polyhedron 3 ##
 - `CGAL::draw<POLY>`
 
 */

Surface_mesh/doc/Surface_mesh/PackageDescription.txt

@@ -38,7 +38,7 @@ and faces is much simpler and can be used at runtime and not at compile time.}
 
 - `CGAL::Surface_mesh<P>`
                 
-### Draw a Surface Mesh ###
+## Draw a Surface Mesh ##
 - `CGAL::draw<SM>`
 
 */

Triangulation_2/doc/Triangulation_2/PackageDescription.txt

@@ -112,7 +112,7 @@ are described in Chapter \ref PkgTDS2Ref "2D Triangulation Data Structure".
 ## Enum ##
 - \link CGAL::Triangulation_2::Locate_type `CGAL::Triangulation_2<Traits,Tds>::Locate_type` \endlink
 
-### Draw a Triangulation 2 ###
+## Draw a Triangulation 2 ##
 - `CGAL::draw<T2>`
 
 */

Triangulation_3/doc/Triangulation_3/PackageDescription.txt

@@ -117,7 +117,7 @@ is opposite to the vertex with the same index. See
 
 - `CGAL::Triangulation_3::Locate_type`
 
-### Draw a Triangulation 3 ###
+## Draw a Triangulation 3 ##
 - `CGAL::draw<T3>`
 
 */