correction de la methode mod (suppresion des 0)

polynomial.py

@@ -60,6 +60,12 @@ class Polynomial:
         for i in range(len(a)):
             result[i] = a[i] % other
 
+        for i in reversed(range(len(result))):
+            if result[i] ==0:
+                del result[i]
+            else:
+                break
+        
         return Polynomial(tuple(result))
 
     def __str__(self):