<form class="form form-horizontal" ng-submit="sendMessage()">
  <div class="input-group">
    <input id="sendMessage" type="text" class="form-control monospace" autocomplete="off" ng-model="command">
    <span class="input-group-btn">
      <button class="btn btn-default btn-primary">Send</button>
    </span>
  </div>
</form>