fix javadoc error and formatting some notes (#1977)

* formatting some notes

* formatting some notes

* remove invalid notes

* cancel some commits

Co-authored-by: liufangtao <liufangtao@xiaomi.com>

spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/config/SimpleUrlHandlerMappingGlobalCorsAutoConfiguration.java

@@ -27,9 +27,7 @@ import org.springframework.web.reactive.handler.SimpleUrlHandlerMapping;
 /**
  * This is useful for PreFlight CORS requests. We can add a "global" configuration here so
  * we don't have to modify existing predicates to allow the "options" HTTP method.
- *
  */
-
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(SimpleUrlHandlerMapping.class)
 @ConditionalOnProperty(name = "spring.cloud.gateway.globalcors.add-to-simple-url-handler-mapping",

spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/NettyRoutingFilter.java

@@ -237,7 +237,6 @@ public class NettyRoutingFilter implements GlobalFilter, Ordered {
 	 * timeout configuration.
 	 * @param route the current route.
 	 * @param exchange the current ServerWebExchange.
-	 * @param chain the current GatewayFilterChain.
 	 * @return
 	 */
 	protected HttpClient getHttpClient(Route route, ServerWebExchange exchange) {

spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/route/builder/GatewayFilterSpec.java

@@ -354,8 +354,7 @@ public class GatewayFilterSpec extends UriSpec {
 
 	/**
 	 * A filter that will set the Host header to
-	 * {@param hostName} on the outgoing
-	 * request.
+	 * {@param hostName} on the outgoing request.
 	 * @param hostName the updated Host header value
 	 * @return a {@link GatewayFilterSpec} that can be used to apply additional filters
 	 */