You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: print_test.go
    path of file: ./repos/protoreflect/desc/protoprint
    
    the code of the file until where you have to start completion: package protoprint

import (
	"bytes"
    
func TestQuoteString(t *testing.T) {
	// other tests have examples of encountering invalid UTF8 and printable unicode
	// so this is just for testing how unprintable valid unicode characters are rendered
	s := quotedString("\x04")
	testutil.Eq(t, "\"\\004\"", s)
	s = quotedString("\x7F")
	testutil.Eq(t, "\"\\177\"", s)
	s = quotedString("\u2028")
	testutil.Eq(t, "\"\\u2028\"", s)
	s = quotedString("\U0010FFFF")
	testutil.Eq(t, "\"\\U0010FFFF\"", s)
}