message: Attempt to fix texdoc with Miktex
  We catch stdout and stderr.
  Related to
diff: @@ -548,10 +548,10 @@ export class Commander {
  this.extension.parser.parse(vscode.window.activeTextEditor.document.getText())
  }
  - async texdoc(pkg: number) {
  + async texdoc(pkg: string) {
  const configuration = vscode.workspace.getConfiguration('latex-workshop')
  const texdocPath = configuration.get('texdoc.path') as string
  - const proc = cp.spawn(texdocPath, [String(pkg)])
  + const proc = cp.spawn(texdocPath, ['--view', pkg])
  let stdout = ''
  proc.stdout.on('data', newStdout => {
  @@ -574,7 +574,7 @@ export class Commander {
  this.extension.logger.showErrorMessage('Texdoc failed. Please refer to LaTeX Workshop Output for details.')
  } else {
  const regex = new RegExp(`(no documentation found)|(Documentation for ${pkg} could not be found)`)
  - if (stdout.match(regex)) {
  + if (stdout.match(regex) || stderr.match(regex)) {
  this.extension.logger.addLogMessage(`Cannot find documentation for ${pkg}.`)
  this.extension.logger.showErrorMessage(`Cannot find documentation for ${pkg}.`)
  } else {
  