message: The same comment in the file format description...
diff: @@ -119,6 +119,9 @@ namespace Gudhi {
  Other sample files can be found in the `data/bitmap` folder.
  + Please note that unlike in Perseus format the filtration on the maximal cubes can be any double precision number.
  + Consequently one cannot mark the cubes that are not present with -1's. To do that please set their filtration value to +Inf.
  +
  */
  } // namespace Gudhi
  