message: Change some output messages and documentation to me more explicit
diff: @@ -24,7 +24,7 @@ typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > Kern;
  py::array_t<double> generate_points_on_sphere(size_t n_samples, int ambient_dim, double radius, std::string sample) {
  if (sample != "random") {
  - throw pybind11::value_error("sample type is not supported");
  + throw pybind11::value_error("This sample type is not supported");
  }
  py::array_t<double> points({n_samples, (size_t)ambient_dim});
  @@ -50,7 +50,7 @@ PYBIND11_MODULE(points, m) {
  m.attr("__license__") = "LGPL v3";
  m.def("sphere", &generate_points_on_sphere,
  py::arg("n_samples"), py::arg("ambient_dim"),
  - py::arg("radius") = 1, py::arg("sample") = "random",
  + py::arg("radius") = 1., py::arg("sample") = "random",
  R"pbdoc(
  Generate random i.i.d. points uniformly on a (d-1)-sphere in R^d
  @@ -58,9 +58,9 @@ PYBIND11_MODULE(points, m) {
  :type n_samples: integer
  :param ambient_dim: The ambient dimension d.
  :type ambient_dim: integer
  - :param radius: The radius.
  + :param radius: The radius. Default value is `1.`.
  :type radius: float
  - :param sample: The sample type.
  + :param sample: The sample type. Default and only available value is `"random"`.
  :type sample: string
  :rtype: numpy array of float
  :returns: the generated points on a sphere.
  