Polishing

spring-core/src/main/java/org/springframework/core/ResolvableType.java

@@ -976,8 +976,7 @@ public class ResolvableType implements Serializable {
 		if (this.resolved == null) {
 			return "?";
 		}
-		if (this.type instanceof TypeVariable) {
-			TypeVariable<?> variable = (TypeVariable<?>) this.type;
+		if (this.type instanceof TypeVariable<?> variable) {
 			if (this.variableResolver == null || this.variableResolver.resolveVariable(variable) == null) {
 				// Don't bother with variable boundaries for toString()...
 				// Can cause infinite recursions in case of self-references

spring-web/src/main/java/org/springframework/http/client/HttpComponentsClientHttpRequest.java

@@ -59,6 +59,7 @@ final class HttpComponentsClientHttpRequest extends AbstractBufferingClientHttpR
 		this.httpContext = context;
 	}
 
+
 	@Override
 	public HttpMethod getMethod() {
 		return HttpMethod.valueOf(this.httpRequest.getMethod());

spring-web/src/main/java/org/springframework/http/client/reactive/HttpComponentsClientHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,12 +39,12 @@ import org.springframework.core.io.buffer.DataBuffer;
 import org.springframework.core.io.buffer.DataBufferFactory;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
 import org.springframework.lang.Nullable;
 
-import static org.springframework.http.MediaType.ALL_VALUE;
-
 /**
  * {@link ClientHttpRequest} implementation for the Apache HttpComponents HttpClient 5.x.
+ *
  * @author Martin Tarjányi
  * @author Arjen Poutsma
  * @since 5.3
@@ -125,7 +125,7 @@ class HttpComponentsClientHttpRequest extends AbstractClientHttpRequest {
 				.forEach(entry -> entry.getValue().forEach(v -> this.httpRequest.addHeader(entry.getKey(), v)));
 
 		if (!this.httpRequest.containsHeader(HttpHeaders.ACCEPT)) {
-			this.httpRequest.addHeader(HttpHeaders.ACCEPT, ALL_VALUE);
+			this.httpRequest.addHeader(HttpHeaders.ACCEPT, MediaType.ALL_VALUE);
 		}
 	}