Update De_Rham_Cohomology_of_smooth_manifolds.cpp

De_Rham_Cohomology_of_smooth_manifolds.cpp

@@ -13,7 +13,7 @@ bool is_topological_space(const std::string& M)
 int main()
 {
     // supposed A_topological_space_M, is_topological_space function
-    Suppose_literal (a_topological_space_M, is_topological_space("M_string"));
+    Suppose_literal (a_topological_space_M, is_topological_space ("M_string"));
     // like above, you may create a function for each literal below
     Suppose_literal (M_is_Hausdorff, true);
     Suppose_literal (points_can_be_seperated_by_open_sets, true);