Add a note about letter case in generic I/O functions

BGL/include/CGAL/boost/graph/IO/polygon_mesh_io.h

@@ -138,7 +138,7 @@ bool read_polygon_mesh(const std::string& fname, Graph& g)
  * - \ref IOStreamGocad (`.ts`)
  * - \ref IOStreamVTK (`.vtp`)
  *
- * The format is detected from the filename extension.
+ * The format is detected from the filename extension (letter case is not important).
  *
  * \tparam Graph a model of `MutableFaceGraph`
  * \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"
@@ -261,7 +261,7 @@ bool write_polygon_mesh(const std::string& fname, Graph& g)
  * - \ref IOStreamGocad (`.ts`)
  * - \ref IOStreamVTK (`.vtp`)
  *
- * The format is detected from the filename extension.
+ * The format is detected from the filename extension (letter case is not important).
  *
  * \tparam Graph a model of `FaceListGraph` and `HalfedgeListGraph`
  * \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"

Point_set_3/include/CGAL/Point_set_3/IO.h

@@ -118,9 +118,9 @@ bool read_point_set(const std::string& fname,
   - \ref IOStreamLAS (`.las`)
   - \ref IOStreamXYZ (`.xyz`)
 
-  The format is detected from the filename extension. If the file contains
-  normal vectors, the normal map is added to the point set. For PLY
-  input, all point properties found in the header are added.
+  The format is detected from the filename extension (letter case is not important).
+  If the file contains normal vectors, the normal map is added to the point set.
+  For PLY input, all point properties found in the header are added.
 
   \tparam Point a `CGAL::Point_3`
   \tparam Vector a `CGAL::Vector_3`
@@ -200,7 +200,7 @@ bool write_point_set(const std::string& fname,
   - \ref IOStreamLAS (`.las`)
   - \ref IOStreamXYZ (`.xyz`)
 
-  The format is detected from the filename extension.
+  The format is detected from the filename extension (letter case is not important).
 
   \tparam Point a `CGAL::Point_3`
   \tparam Vector a `CGAL::Vector_3`

Point_set_processing_3/include/CGAL/IO/read_points.h

@@ -86,7 +86,7 @@ bool read_points(const std::string& fname, OutputIterator output)
   - \ref IOStreamLAS (`.las`)
   - \ref IOStreamXYZ (`.xyz`)
 
-  The format is detected from the filename extension.
+  The format is detected from the filename extension (letter case is not important).
 
   \tparam OutputIteratorValueType type of objects that can be put in `PointOutputIterator`.
   It is default to `value_type_traits<PointOutputIterator>::%type` and can be omitted when the default is fine.

Point_set_processing_3/include/CGAL/IO/write_points.h

@@ -77,7 +77,7 @@ bool write_points(const std::string& fname,const PointRange& points,
   - \ref IOStreamLAS (`.las`)
   - \ref IOStreamXYZ (`.xyz`)
 
-  The format is detected from the filename extension.
+  The format is detected from the filename extension (letter case is not important).
 
   \tparam PointRange is a model of `ConstRange`. The value type of
   its iterator is the key type of the named parameter `point_map`.

Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h

@@ -48,7 +48,7 @@ namespace Polygon_mesh_processing {
  * - \ref IOStreamGocad (`.ts`)
  * - \ref IOStreamVTK (`.vtp`)
  *
- * The format is detected from the filename extension.
+ * The format is detected from the filename extension (letter case is not important).
  *
  * \tparam PolygonMesh a model of `MutableFaceGraph`
  * \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"

Stream_support/include/CGAL/IO/polygon_soup_io.h

@@ -100,7 +100,7 @@ bool read_polygon_soup(const std::string& fname, PointRange& points, PolygonRang
  * - \ref IOStreamGocad (`.ts`)
  * - \ref IOStreamVTK (`.vtp`)
  *
- * The format is detected from the filename extension.
+ * The format is detected from the filename extension (letter case is not important).
  *
  * \tparam PolygonRange a model of the concept `RandomAccessContainer`
  *                      whose value_type is a model of the concept `RandomAccessContainer`
@@ -211,7 +211,7 @@ bool write_polygon_soup(const std::string& fname, PointRange& points, PolygonRan
  * - \ref IOStreamGocad (`.ts`)
  * - \ref IOStreamVTK (`.vtp`)
  *
- * The format is detected from the filename extension.
+ * The format is detected from the filename extension (letter case is not important).
  *
  * \tparam PolygonRange a model of the concept `RandomAccessContainer`
  *                      whose value_type is a model of the concept `RandomAccessContainer`