q := u.Query()
	q.Set("q", "golang")
	u.RawQuery = q.Encode()
	fmt.Println(u)
	// Output: https://google.com/search?q=golang
}

func ExampleURL_roundtrip() {
	// Parse + String preserve the original encoding.
	u, err := url.Parse("https://example.com/foo%2fbar")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(u.Path)
	fmt.Println(u.RawPath)
	fmt.Println(u.String())
	// Output:
	// /foo/bar

		// Symlink targets are relative to the directory containing the link.
		dstAbs = filepath.Join(filepath.Dir(linkPath), dst)
	}

	// Check that the target is correct by comparing it with os.Stat
	// on the original target path.
	dstInfo, err := os.Stat(dstAbs)
	if err != nil {
		log.Fatal(err)
	}
	targetInfo, err := os.Stat(targetPath)
	if err != nil {
		log.Fatal(err)
	}
	if !os.SameFile(dstInfo, targetInfo) {

	// file set fset.
	funcAST, fset := parseFunc("example_test.go", "printSelf")

	// Print the function body into buffer buf.
	// The file set is provided to the printer so that it knows
	// about the original source formatting and can add additional
	// line breaks where they were present in the source.
	var buf bytes.Buffer
	printer.Fprint(&buf, fset, funcAST.Body)

	// Remove braces {} enclosing the function body, unindent,