message: limit sig_figs to 18
diff: @@ -10,7 +10,7 @@ class arg_output_sig_figs : public int_argument {
  arg_output_sig_figs() : int_argument() {
  _name = "sig_figs";
  _description = "The number of significant figures used for the output CSV files.";
  - _validity = "integer >= 0 or -1 to use the default number of significant figures";
  + _validity = "0 <= integer <= 18 or -1 to use the default number of significant figures";
  _default = "-1";
  _default_value = -1;
  _constrained = true;
  