Minor. Put if-statements into brackets

Author: ullenius

src/main/java/dev/personnummer/Personnummer.java

@@ -229,12 +229,15 @@ public int hashCode() {
 
 	@Override
 	public boolean equals(Object obj) {
-		if (this == obj)
+		if (this == obj) {
 			return true;
-		if (obj == null)
+		}
+		if (obj == null) {
 			return false;
-		if (getClass() != obj.getClass())
+		}
+		if (getClass() != obj.getClass()) {
 			return false;
+		}
 		Personnummer other = (Personnummer) obj;
 		return Objects.equals(format(true), other.format(true));
 	}