Add print units function

src/units.c

@@ -594,6 +594,7 @@ double units_conversion_factor(const struct unit_system* from,
  * @param us The #unit_system
  */
 void units_print(const struct unit_system* us) {
+
   message("Units:");
   message("\tUnit Mass:        %g", us->UnitMass_in_cgs);
   message("\tUnit Length:      %g", us->UnitLength_in_cgs);