Many fixes for MString, ZString.

MString.cpp

@@ -105,30 +105,30 @@ namespace coreutils {
       int len = strlen(value);
       setSize(len + length);
       memcpy(data + temp, value, len);
-      return *this;            
+      return *this;
    }
 
    MString& MString::operator<<(const int value) {
       std::stringstream temp;
       temp << value;
       *this << temp.str();
-      return *this;            
+      return *this;
    }
 
-   // MString& MString::operator<<(coreutils::ZString &zstring) {
-   //    int temp = length;
-   //    int len = length + zstring.getLength();
-   //    setSize(len);
-   //    memcpy(data + temp, zstring.getData(), zstring.getLength());
-   //    return *this;            
-   // }
+//   MString& MString::operator<<(coreutils::ZString &zstring) {
+//      int temp = length;
+//      int len = length + zstring.getLength();
+//      setSize(len);
+//      memcpy(data + temp, zstring.getData(), zstring.getLength());
+//      return *this;
+//   }
 
    MString& MString::operator<<(coreutils::ZString zstring) {
       int temp = length;
       int len = length + zstring.getLength();
       setSize(len);
       memcpy(data + temp, zstring.getData(), zstring.getLength());
-      return *this;            
+      return *this;
    }
 
    MString& MString::operator<<(std::string value) {
@@ -136,7 +136,7 @@ namespace coreutils {
       int len = length + value.length();
       setSize(len);
       memcpy(data + temp, value.c_str(), value.length());
-      return *this;            
+      return *this;
    }
 
    MString& MString::write(char ch) {