Improve Javadoc of ServerHttpRequest#getPath

Closes gh-26469

spring-web/src/main/java/org/springframework/http/server/reactive/ServerHttpRequest.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.
@@ -48,9 +48,14 @@ public interface ServerHttpRequest extends HttpRequest, ReactiveHttpInputMessage
 	String getId();
 
 	/**
-	 * Returns a structured representation of the request path including the
-	 * context path + path within application portions, path segments with
-	 * encoded and decoded values, and path parameters.
+	 * Returns a structured representation of the full request path up to but
+	 * not including the {@link #getQueryParams() query}.
+	 * <p>The returned path is sub-divided into a
+	 * {@link RequestPath#contextPath()} portion and the remaining
+	 * {@link RequestPath#pathWithinApplication() pathwithinApplication} portion.
+	 * The latter can be passed into methods of
+	 * {@link org.springframework.web.util.pattern.PathPattern} for path
+	 * matching purposes.
 	 */
 	RequestPath getPath();