Added some comments

dlib/matlab/mex_wrapper.cpp

@@ -4885,7 +4885,9 @@ void mexFunction( int nlhs, mxArray *plhs[],
                  << "        function this = "<<classname<<"()\n"
                  << "            this.cpp_ptr = "<<mex_filename<<"('construct');\n"
                  << "        end\n"
+                 << "\n"
                  << "        function copied_obj = clone(this)\n"
+                 << "            %Returns a new independent object that is a copy of this.\n"
                  << "            copied_obj = "<<classname<<"();\n"
                  << "            copied_obj.cpp_ptr = "<<mex_filename<<"(this.cpp_ptr,'clone');\n"
                  << "        end\n"