minor: fix spaces between comments

Author: Rosander0

src/test/java/com/thealgorithms/maths/FriendlyNumberTest.java

@@ -2,7 +2,6 @@
 // author: Vraj Prajapati @Rosander0
 
 import static org.junit.jupiter.api.Assertions.assertFalse;
-
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;