modified to string to match previous changes on type

src/main/java/ch/hepia/api/transport/Coordinates.java

@@ -36,7 +36,7 @@ public class Coordinates {
     @Override
     public String toString(){
         StringBuilder string = new StringBuilder();
-        return string.append(type.toString()).append("au point (").append(x).append(", ").append(y).append(")").toString();
+        return string.append("Coordonnées du type ").append(type).append(" au point (").append(x).append(", ").append(y).append(")").toString();
     }
 
     /**