message: Add a long option for the command flag (-e)
diff: @@ -90,6 +90,7 @@ impl Options {
  .takes_value(true)
  .help("Specify alternative configuration file [default: $XDG_CONFIG_HOME/alacritty/alacritty.yml]"))
  .arg(Arg::with_name("command")
  + .long("command")
  .short("e")
  .multiple(true)
  .takes_value(true)
  