fix(tests): remove unnecessary whitespace in test assertion for encryption

Author: dheeraj1010

src/main/java/com/thealgorithms/ciphers/PermutationCipher.java

@@ -191,4 +191,4 @@ private String removePadding(String text) {
     public char getPaddingChar() {
         return PADDING_CHAR;
     }
-}
+}

src/test/java/com/thealgorithms/ciphers/PermutationCipherTest.java

@@ -246,8 +246,7 @@ void testSpecificExampleFromDescription() {
         // then
         // Block 1: "HEL" -> positions {3,1,2} -> "LHE"
         // Block 2: "LOX" -> positions {3,1,2} -> "XLO"
-        assertEquals("LHEXLO", encrypted);
-        
+    assertEquals("LHEXLO", encrypted);
         // Verify decryption
         String decrypted = cipher.decrypt(encrypted, key);
         assertEquals("HELLO", decrypted);