Use unquoted value in assertion message in MediaType.checkParameters()

Closes gh-29461

Author: jhoeller

spring-web/src/main/java/org/springframework/http/MediaType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -534,7 +534,7 @@ protected void checkParameters(String parameter, String value) {
 			String unquotedValue = unquote(value);
 			double d = Double.parseDouble(unquotedValue);
 			Assert.isTrue(d >= 0D && d <= 1D,
-					() -> "Invalid quality value \"" + value + "\": should be between 0.0 and 1.0");
+					() -> "Invalid quality value \"" + unquotedValue + "\": should be between 0.0 and 1.0");
 		}
 	}