Polish contribution

Closes gh-5171

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ResourceProperties.java

@@ -221,6 +221,7 @@ public class ResourceProperties implements ResourceLoaderAware {
 		public void setGzipped(boolean gzipped) {
 			this.gzipped = gzipped;
 		}
+
 	}
 
 	/**

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -322,6 +322,7 @@ content into your application; rather pick only the properties that you need.
 	spring.resources.cache-period= # Cache period for the resources served by the resource handler, in seconds.
 	spring.resources.chain.cache=true # Enable caching in the Resource chain.
 	spring.resources.chain.enabled= # Enable the Spring Resource Handling chain. Disabled by default unless at least one strategy has been enabled.
+	spring.resources.chain.gzipped=false # Enable resolution of already gzipped resources.
 	spring.resources.chain.html-application-cache=false # Enable HTML5 application cache manifest rewriting.
 	spring.resources.chain.strategy.content.enabled=false # Enable the content Version Strategy.
 	spring.resources.chain.strategy.content.paths=/** # Comma-separated list of patterns to apply to the Version Strategy.