update x/tools version used in go:generate

Fixes running this go:generate line with Go tip.

cmdgo_quoted.go

@@ -20,6 +20,8 @@ func cmdgoQuotedisSpaceByte(c byte) bool {
 // allowing single or double quotes around elements.
 // There is no unescaping or other processing within
 // quoted fields.
+//
+// Keep in sync with cmd/dist/quoted.go
 func cmdgoQuotedSplit(s string) ([]string, error) {
 	// Split fields allowing '' or "" around elements.
 	// Quotes further inside the string do not count.
@@ -81,16 +83,16 @@ func cmdgoQuotedJoin(args []string) (string, error) {
 		}
 		switch {
 		case !sawSpace && !sawSingleQuote && !sawDoubleQuote:
-			buf = append(buf, []byte(arg)...)
+			buf = append(buf, arg...)
 
 		case !sawSingleQuote:
 			buf = append(buf, '\'')
-			buf = append(buf, []byte(arg)...)
+			buf = append(buf, arg...)
 			buf = append(buf, '\'')
 
 		case !sawDoubleQuote:
 			buf = append(buf, '"')
-			buf = append(buf, []byte(arg)...)
+			buf = append(buf, arg...)
 			buf = append(buf, '"')
 
 		default:

main.go

@@ -1393,7 +1393,7 @@ func (tf *transformer) findReflectFunctions(files []*ast.File) {
 // cmd/bundle will include a go:generate directive in its output by default.
 // Ours specifies a version and doesn't assume bundle is in $PATH, so drop it.
 
-//go:generate go run golang.org/x/tools/cmd/bundle@v0.1.9 -o cmdgo_quoted.go -prefix cmdgoQuoted cmd/internal/quoted
+//go:generate go run golang.org/x/tools/cmd/bundle@v0.5.0 -o cmdgo_quoted.go -prefix cmdgoQuoted cmd/internal/quoted
 //go:generate sed -i /go:generate/d cmdgo_quoted.go
 
 // prefillObjectMaps collects objects which should not be obfuscated,