Ensure all files end with a new line

Update all files to ensure that they always end with a new-line
character.

Issue gh-8945

rsocket/src/test/java/org/springframework/security/rsocket/metadata/BasicAuthenticationDecoderTests.java

@@ -50,4 +50,4 @@ public class BasicAuthenticationDecoderTests {
 		assertThat(actualCredentials).isEqualToComparingFieldByField(expectedCredentials);
 	}
 
-}
+}