message: Made stderr from browser process to /dev/null
diff: @@ -7,6 +7,7 @@ pub fn open_browser(url: &str) -> Result<(), failure::Error> {
  Command::new("cmd")
  .args(&["/C", &windows_cmd])
  .stdout(Stdio::null())
  + .stderr(Stdio::null())
  .spawn()?;
  } else if cfg!(target_os = "linux") {
  let linux_cmd = format!(r#"xdg-open "{}""#, url);
  @@ -14,6 +15,7 @@ pub fn open_browser(url: &str) -> Result<(), failure::Error> {
  .arg("-c")
  .arg(&linux_cmd)
  .stdout(Stdio::null())
  + .stderr(Stdio::null())
  .spawn()?;
  } else {
  let mac_cmd = format!(r#"open "{}""#, url);
  @@ -21,6 +23,7 @@ pub fn open_browser(url: &str) -> Result<(), failure::Error> {
  .arg("-c")
  .arg(&mac_cmd)
  .stdout(Stdio::null())
  + .stderr(Stdio::null())
  .spawn()?;
  };
  