Merge branch '5.3.x'

src/docs/asciidoc/languages/kotlin.adoc

@@ -30,6 +30,8 @@ and https://search.maven.org/artifact/org.jetbrains.kotlin/kotlin-reflect[`kotli
 to be present on the classpath. They are provided by default if you bootstrap a Kotlin project on
 https://start.spring.io/#!language=kotlin&type=gradle-project[start.spring.io].
 
+WARNING: Kotlin https://kotlinlang.org/docs/inline-classes.html[inline classes] are not yet supported.
+
 NOTE: The https://github.com/FasterXML/jackson-module-kotlin[Jackson Kotlin module] is required
 for serializing or deserializing JSON data for Kotlin classes with Jackson, so make sure to add the
 `com.fasterxml.jackson.module:jackson-module-kotlin` dependency to your project if you have such need.

src/docs/asciidoc/web/webflux.adoc

@@ -2998,7 +2998,7 @@ configure or customize message writing.
 	public ResponseEntity<String> handle() {
 		String body = ... ;
 		String etag = ... ;
-		return ResponseEntity.ok().eTag(etag).build(body);
+		return ResponseEntity.ok().eTag(etag).body(body);
 	}
 ----
 [source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]

src/docs/asciidoc/web/webmvc.adoc

@@ -3392,7 +3392,7 @@ See <<mvc-ann-jackson>> for details.
 	public ResponseEntity<String> handle() {
 		String body = ... ;
 		String etag = ... ;
-		return ResponseEntity.ok().eTag(etag).build(body);
+		return ResponseEntity.ok().eTag(etag).body(body);
 	}
 ----
 [source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]