overrode toString method in StringArgumentReader

Author: DatAsianBoi123

src/main/java/com/datasiqn/commandcore/argument/StringArgumentReader.java

@@ -74,4 +74,9 @@ public void jumpTo(int index) {
         }
         return builder.toString();
     }
+
+    @Override
+    public String toString() {
+        return arg;
+    }
 }