message: pipe doctest command to stdio::null
diff: @@ -76,7 +76,11 @@ pub fn get_tests(config: &Config) -> Result<Vec<TestBinary>, RunError> {
  for ty in &config.run_types {
  let mut cmd = create_command(manifest, config, ty);
  + if ty != &RunType::Doctests {
  cmd.stdout(Stdio::piped());
  + } else {
  + cmd.stdout(Stdio::null());
  + }
  if !config.verbose {
  cmd.stderr(Stdio::null());
  }
  