bug fixes on mstring and jstring.

MString.cpp

@@ -165,7 +165,8 @@ namespace coreutils {
    MString &MString::operator<<(const int value) {
       std::stringstream temp;
       temp << value;
-      *this << temp.str();
+      MString temp2 = temp.str();
+      write(temp2);
       return *this;
    }
    
@@ -185,13 +186,13 @@ namespace coreutils {
       return *this;
    }
    
-   MString &MString::operator<<(std::string value) {
-      int temp = length;
-      int len = length + value.length();
-      setSize(len);
-      memcpy(data + temp, value.c_str(), value.length());
-      return *this;
-   }
+//   MString &MString::operator<<(std::string value) {
+//      int temp = length;
+//      int len = length + value.length();
+//      setSize(len);
+//      memcpy(data + temp, value.c_str(), value.length());
+//      return *this;
+//   }
 
 //   MString &MString::operator<<(std::ostream (*f)(std::ostream&)) {
    MString &MString::operator<<(std::basic_ostream<char> (*pf)(std::basic_ostream<char>&)) {