Apply Checkstyle WhitespaceAfterCheck module

samples/javaconfig/hellowebflux-method/src/test/java/sample/HelloWebfluxMethodApplicationTests.java

@@ -138,10 +138,10 @@ public class HelloWebfluxMethodApplicationTests {
 	}
 
 	private Consumer<Map<String, Object>> robsCredentials() {
-		return basicAuthenticationCredentials("rob","rob");
+		return basicAuthenticationCredentials("rob", "rob");
 	}
 
 	private Consumer<Map<String, Object>> adminCredentials() {
-		return basicAuthenticationCredentials("admin","admin");
+		return basicAuthenticationCredentials("admin", "admin");
 	}
 }