Trying to fix MString assignments.

testing/mstring_test.cpp

@@ -19,7 +19,7 @@ int main(int argc, char **argv) {
    coreutils::MString ytest("this is a test");
    xtest = ytest;
    std::cout << "assign mstring to mstring: " << xtest << std::endl;
-   
+
    // Character assignment tests.
    coreutils::MString test3;
    test3 = 'a';
@@ -29,6 +29,7 @@ int main(int argc, char **argv) {
    coreutils::MString test4;
    test4 << "this is a test." << test7;
    std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
+
    test4 << "another test " << 75;
    std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
 
@@ -43,7 +44,7 @@ int main(int argc, char **argv) {
    std::cout << "streaming from std::string: [" << test14 << "]." << std::endl;
 
    coreutils::MString test9("XXXXXXXXXYYYYYYYYYY");
-   std::cout << "test insert: " << test9 << std::endl;      
+   std::cout << "test insert: " << test9 << std::endl;
    coreutils::MString test8("zzz");
    test9.insert(test8, 9);
    test9.insert("aaaaa", 9);
@@ -64,10 +65,18 @@ int main(int argc, char **argv) {
    coreutils::MString test21;
    test21 = test20;
    std::cout << "mstring = zstring: [" << test21 <<  "]" << std::endl;
+
    coreutils::MString test22;
    test22 << test20;
    std::cout << "mstring << zstring: [" << test22 <<  "]" << std::endl;
-   
+
+   std::string test23 = "this is a string";
+   test22 = test23;
+   std::cout << "mstring = string: [" << test22 <<  "]" << std::endl;
+
+   test22 << test23;
+   std::cout << "mstring << string: [" << test22 <<  "]" << std::endl;
+
    return 0;
 }