Apply Checkstyle WhitespaceAfterCheck module

samples/javaconfig/hellowebflux/src/integration-test/java/sample/HelloWebfluxApplicationITests.java

@@ -87,10 +87,10 @@ public class HelloWebfluxApplicationITests {
 	}
 
 	private Consumer<Map<String, Object>> userCredentials() {
-		return basicAuthenticationCredentials("user","user");
+		return basicAuthenticationCredentials("user", "user");
 	}
 
 	private Consumer<Map<String, Object>> invalidCredentials() {
-		return basicAuthenticationCredentials("user","INVALID");
+		return basicAuthenticationCredentials("user", "INVALID");
 	}
 }