style: format code (#4212)

close #4204

src/test/java/com/thealgorithms/conversions/BinaryToDecimalTest.java

@@ -1,9 +1,9 @@
 package com.thealgorithms.conversions;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 public class BinaryToDecimalTest {
 
     @Test

src/test/java/com/thealgorithms/conversions/HexaDecimalToBinaryTest.java

@@ -1,12 +1,13 @@
 package com.thealgorithms.conversions;
 
-import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.*;
 
+import org.junit.jupiter.api.Test;
+
 public class HexaDecimalToBinaryTest {
 
     @Test
-    public void testHexaDecimalToBinary(){
+    public void testHexaDecimalToBinary() {
         HexaDecimalToBinary hexaDecimalToBinary = new HexaDecimalToBinary();
         assertEquals("1111111111111111111111111111111", hexaDecimalToBinary.convert("7fffffff"));
         assertEquals("101010111100110111101111", hexaDecimalToBinary.convert("abcdef"));

src/test/java/com/thealgorithms/conversions/HexaDecimalToDecimalTest.java

@@ -1,13 +1,13 @@
 package com.thealgorithms.conversions;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 public class HexaDecimalToDecimalTest {
 
     @Test
-    public void testhexaDecimalToDecimal(){
+    public void testhexaDecimalToDecimal() {
         assertEquals(161, HexaDecimalToDecimal.getHexaToDec("A1"));
         assertEquals(428, HexaDecimalToDecimal.getHexaToDec("1ac"));
     }

src/test/java/com/thealgorithms/conversions/RomanToIntegerTest.java

@@ -1,9 +1,9 @@
 package com.thealgorithms.conversions;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 public class RomanToIntegerTest {
 
     @Test