anchor.diff:      style.
         body { margin:0; padding:0; }
         #map { position:absolute; top:0; bottom:0; width:100%; }
  +      #legend { display:none; }
       script.
         window.twttr = (function(d, s, id) {
         var js, fjs = d.getElementsByTagName(s)[0],
  
positive.code:       //minZoom: 8,
        maxZoom: 14
        }).setView([38.8951, -77.0364], 8);
        map.on('popupopen', function(event) {
          twttr.widgets.load();
        });
  
negative.code:     meta(charset='utf-8')
      title Single marker
      meta(name='viewport', content='initial-scale=1,maximum-scale=1,user-scalable=no')
      link(src='//mapbox.com/base/latest/base.css', rel='stylesheet')
      script(src='https://api.mapbox.com/mapbox.js/v2.2.1/mapbox.js')
      link(href='https://api.mapbox.com/mapbox.js/v2.2.1/mapbox.css', rel='stylesheet')
      script(src='https://api.mapbox.com/mapbox.js/plugins/leaflet-markercluster/v0.4.0/leaflet.markercluster.js')
  