Apply checkstyle changes to spring-graphql-docs

See gh-943

spring-graphql-docs/src/main/java/org/springframework/graphql/docs/graalvm/server/GraphQlConfiguration.java

@@ -31,8 +31,8 @@ public class GraphQlConfiguration {
 	@Bean
 	RuntimeWiringConfigurer customWiringConfigurer(BookRepository bookRepository) { // <1>
 		DataFetcher<Book> dataFetcher = QuerydslDataFetcher.builder(bookRepository).single();
-		return wiringBuilder -> wiringBuilder
-				.type("Query", builder -> builder.dataFetcher("book", dataFetcher)); // <2>
+		return (wiringBuilder) -> wiringBuilder
+				.type("Query", (builder) -> builder.dataFetcher("book", dataFetcher)); // <2>
 	}
 
 }

spring-graphql-docs/src/main/java/org/springframework/graphql/docs/graphiql/configuration/GraphiQlConfiguration.java

@@ -28,13 +28,13 @@ import org.springframework.web.servlet.function.ServerResponse;
 @Configuration
 public class GraphiQlConfiguration {
 
-    @Bean
-    @Order(0)
-    public RouterFunction<ServerResponse> graphiQlRouterFunction() {
-        RouterFunctions.Builder builder = RouterFunctions.route();
-        ClassPathResource graphiQlPage = new ClassPathResource("graphiql/index.html"); // <1>
-        GraphiQlHandler graphiQLHandler = new GraphiQlHandler("/graphql", "", graphiQlPage); // <2>
-        builder = builder.GET("/graphiql", graphiQLHandler::handleRequest); // <3>
-        return builder.build(); // <4>
-    }
+	@Bean
+	@Order(0)
+	public RouterFunction<ServerResponse> graphiQlRouterFunction() {
+		RouterFunctions.Builder builder = RouterFunctions.route();
+		ClassPathResource graphiQlPage = new ClassPathResource("graphiql/index.html"); // <1>
+		GraphiQlHandler graphiQLHandler = new GraphiQlHandler("/graphql", "", graphiQlPage); // <2>
+		builder = builder.GET("/graphiql", graphiQLHandler::handleRequest); // <3>
+		return builder.build(); // <4>
+	}
 }

spring-graphql-docs/src/main/java/org/springframework/graphql/docs/server/interception/web/RequestErrorInterceptor.java

@@ -30,20 +30,20 @@ class RequestErrorInterceptor implements WebGraphQlInterceptor {
 
 	@Override
 	public Mono<WebGraphQlResponse> intercept(WebGraphQlRequest request, Chain chain) {
-		return chain.next(request).map(response -> {
+		return chain.next(request).map((response) -> {
 			if (response.isValid()) {
 				return response; // <1>
 			}
 
 			List<GraphQLError> errors = response.getErrors().stream() // <2>
-					.map(error -> {
+					.map((error) -> {
 						GraphqlErrorBuilder<?> builder = GraphqlErrorBuilder.newError();
 						// ...
 						return builder.build();
 					})
 					.toList();
 
-			return response.transform(builder -> builder.errors(errors).build()); // <3>
+			return response.transform((builder) -> builder.errors(errors).build()); // <3>
 		});
 	}
-}
+}

spring-graphql-docs/src/main/java/org/springframework/graphql/docs/server/interception/web/ResponseHeaderInterceptor.java

@@ -33,7 +33,7 @@ class ResponseHeaderInterceptor implements WebGraphQlInterceptor {
 
 	@Override
 	public Mono<WebGraphQlResponse> intercept(WebGraphQlRequest request, Chain chain) { // <2>
-		return chain.next(request).doOnNext(response -> {
+		return chain.next(request).doOnNext((response) -> {
 			String value = response.getExecutionInput().getGraphQLContext().get("cookieName");
 			ResponseCookie cookie = ResponseCookie.from("cookieName", value).build();
 			response.getResponseHeaders().add(HttpHeaders.SET_COOKIE, cookie.toString());

spring-graphql-docs/src/main/java/org/springframework/graphql/docs/server/transports/rsocket/GraphQlRSocketController.java

@@ -43,4 +43,4 @@ public class GraphQlRSocketController {
 	public Flux<Map<String, Object>> handleSubscription(Map<String, Object> payload) {
 		return this.handler.handleSubscription(payload);
 	}
-}
+}