Gwendal in main : add test on futur constraints and enhance input symbol method (#1)

Co-authored-by: ROGER <gwendal.roger@etu.univ-lyon1.fr>
Reviewed-on: #1

app/src/main/java/sudoku/App.java

@@ -44,5 +44,14 @@ public class App {
 
         System.out.println("Symboles possibles :");
         sudoku.getGrille().printSymbolesPossibles();
+
+        //Création d'un second sudoku
+        System.out.println("Création d'un second SUDOKU");
+
+        Sudoku sudoku2 = new Sudoku(9);
+        sudoku2.getGrille().askSetSymbolesPossibles();
+
+        System.out.println("Symboles possibles :");
+        sudoku2.getGrille().printSymbolesPossibles();
     }
 }