Apply suggestion from @jagdish-15

Author: jagdish-15

exercises/practice/simple-cipher/src/test/java/SimpleCipherTest.java

@@ -73,8 +73,10 @@ public void substitutionCipherCanDecode() {
 
     @Disabled("Remove to run test")
     @Test
-    @DisplayName("Is reversible. I.e., if you apply decode in a encoded result, \n" +
-            "you must see the same plaintext encode parameter as a result of the decode method")
+    @DisplayName(
+        "Is reversible. I.e., if you apply decode in a encoded result, " +
+        "you must see the same plaintext encode parameter as a result of the decode method"
+    )
     public void substitutionCipherIsReversibleGivenKey() {
         String plainText = "abcdefghij";
         assertThat(substitutionCipher.decode(substitutionCipher.encode(plainText))).isEqualTo(plainText);