style: format code (#4212)

close #4204

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

@@ -1,9 +1,9 @@
 package com.thealgorithms.ciphers;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 class VigenereTest {
 
     Vigenere vigenere = new Vigenere();
@@ -33,5 +33,4 @@ class VigenereTest {
         // then
         assertEquals("Hello World!", decryptedText);
     }
-
 }