fix example

Author: fey

modules/50-loops/10-while/en/EXERCISE.md

@@ -5,7 +5,8 @@ Edit the `printNumbers()` function so that it prints the numbers in reverse orde
 printNumbers(4);
 ```
 
-```text4
+```text
+4
 3
 2
 1

modules/50-loops/10-while/es/EXERCISE.md

@@ -5,7 +5,8 @@ Modifica la función `printNumbers()` para que muestre los números en orden inv
 printNumbers(4);
 ```
 
-```text4
+```text
+4
 3
 2
 1