lines[line] += " // ERROR"
		for _, e := range sorted {
			lines[line] += fmt.Sprintf(` "%s$"`, e)
		}
	}
	// Write new file.
	err = os.WriteFile(file, []byte(strings.Join(lines, "\n")), 0640)
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		return
	}
	// Polish.
	exec.Command(goTool, "fmt", file).CombinedOutput()
}

	}
	t.Parallel()

	d := t.TempDir()
	if err := WriteFile(filepath.Join(d, "control.txt"), []byte(string("Hello, world!")), 0644); err != nil {
		t.Fatal(err)
	}
	if err := WriteFile(filepath.Join(d, `e:xperi\ment.txt`), []byte(string("Hello, colon and backslash!")), 0644); err != nil {
		t.Fatal(err)
	}

	fsys := DirFS(d)
	err := fs.WalkDir(fsys, ".", func(path string, e fs.DirEntry, err error) error {

        "dirPermissions"     | "dirPermissions { unix(\"0700\") }"               | "dirPermissions { unix(\"0755\") }"
        "filePermissions"    | "filePermissions { unix(\"0600\") }"              | "filePermissions { unix(\"0644\") }"
        "filteringCharset"   | "filteringCharset = 'iso8859-1'"                  | "filteringCharset = 'utf-8'"
    }

    def "null action is forbidden for #method"() {
        given:

func testFileServerImplicitLeadingSlash(t *testing.T, mode testMode) {
	tempDir := t.TempDir()
	if err := os.WriteFile(filepath.Join(tempDir, "foo.txt"), []byte("Hello world"), 0644); err != nil {
		t.Fatalf("WriteFile: %v", err)
	}
	ts := newClientServerTest(t, mode, StripPrefix("/bar/", FileServer(Dir(tempDir)))).ts
	get := func(suffix string) string {
		res, err := ts.Client().Get(ts.URL + suffix)

  Returns:
    An integer if converted successfully, otherwise return None.
  """
  version = version.split('-')[0]
  version_segments = version.split('.')
  # Treat "0.24" as "0.24.0"
  if len(version_segments) == 2:
    version_segments.append('0')
  for seg in version_segments:
    if not seg.isdigit():
      return None

			}
			dir := filepath.Dir(tc.deviceMountPath)
			// Make JSON for this object
			if tc.jsonFile != "" {
				dataPath := filepath.Join(dir, volDataFileName)
				if err := os.WriteFile(dataPath, []byte(tc.jsonFile), 0644); err != nil {
					t.Fatalf("error creating %s: %s", dataPath, err)
				}
			}
			if tc.createPV {
				// Make the PV for this object
				pvName := filepath.Base(dir)

	}

	if c < sys.ExecArgLengthLimit {
		return argv
	}

	// Only use response files if they are supported.
	response := filepath.Join(*flagTmpdir, "response")
	if err := os.WriteFile(response, nil, 0644); err != nil {
		log.Fatalf("failed while testing response file: %v", err)
	}
	if !linkerFlagSupported(ctxt.Arch, argv[0], altLinker, "@"+response) {
		if ctxt.Debugvlog != 0 {

		resolverConfig: &resolvConf,
	}
	conf.initOnce.Do(conf.init)
	return conf, nil
}

func (conf *resolvConfTest) write(lines []string) error {
	f, err := os.OpenFile(conf.path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600)
	if err != nil {
		return err
	}
	if _, err := f.WriteString(strings.Join(lines, "\n")); err != nil {
		f.Close()
		return err
	}
	f.Close()
	return nil
}

			}
		}
	}

	<-doneChan
	if !write {
		serverConn.Close()
	}

	if write {
		path := test.dataPath()
		out, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
		if err != nil {
			t.Fatalf("Failed to create output file: %s", err)
		}
		defer out.Close()
		recordingConn.Close()
		close(stdin)
		childProcess.Process.Kill()
		childProcess.Wait()

	bytes := []byte(contents)
	if strings.HasSuffix(path, ".go") {
		formatted, err := format.Source(bytes)
		if err == nil {
			bytes = formatted
		}
	}
	tg.must(os.WriteFile(filepath.Join(tg.tempdir, path), bytes, 0644))
}

// tempDir adds a temporary directory for a run of testgo.
func (tg *testgoData) tempDir(path string) {
	tg.t.Helper()
	tg.makeTempdir()