message: Added new quiet flag.
diff: @@ -461,14 +461,16 @@ fn execute_test(test: &Path, ignored: bool, config: &Config) {
  temp.push_str(value.as_str());
  envars.push(CString::new(temp).unwrap());
  }
  - if config.verbose {
  - envars.push(CString::new("RUST_BACKTRACE=1").unwrap());
  - }
  let mut argv = if ignored {
  vec![exec_path.clone(), CString::new("--ignored").unwrap()]
  } else {
  vec![exec_path.clone()]
  };
  + if config.verbose {
  + envars.push(CString::new("RUST_BACKTRACE=1").unwrap());
  + } else {
  + argv.push(CString::new("--quiet").unwrap());
  + }
  for s in &config.varargs {
  argv.push(CString::new(s.as_bytes()).unwrap_or_default());
  }
  