Update README

src/Main.java

@@ -9,11 +9,11 @@ public class Main {
     public static void main(String[] args) {
         Expression e = new Expression();
         e.negExpressionPrefixe();
-        System.out.println(e.getExpressionPrefixe());
+        //System.out.println(e.getExpressionPrefixe());
         System.out.println();
 
         Tree treeExpression = new Tree(e.getExpressionPrefixe());
-        treeExpression.display();
+        //treeExpression.display();
 
         Handling handling = new Handling(treeExpression.getRoot());
     }