Use array.clone() instead of manual array creation

spring-context-support/src/main/java/org/springframework/mail/SimpleMailMessage.java

@@ -276,9 +276,7 @@ public class SimpleMailMessage implements MailMessage, Serializable {
 	}
 
 	private static String[] copy(String[] state) {
-		String[] copy = new String[state.length];
-		System.arraycopy(state, 0, copy, 0, state.length);
-		return copy;
+		return state.clone();
 	}
 
 }