Remove tabs from dart.js

pkg/browser/lib/dart.js

Index: pkg/browser/lib/dart.js
diff --git a/pkg/browser/lib/dart.js b/pkg/browser/lib/dart.js
index b5073788af87841c95621a9781852bf18c314340..d610647acec2e5300093271839c852495e95f567 100644
--- a/pkg/browser/lib/dart.js
+++ b/pkg/browser/lib/dart.js
@@ -27,9 +27,9 @@ if (navigator.webkitStartDart) {
           var script = document.createElement('script');
           script.src = scripts[i].src.replace(/\.dart(?=\?|$)/, '.dart.js');
           var parent = scripts[i].parentNode;
-	  // TODO(vsm): Find a solution for issue 8455 that works with more
-	  // than one script.
-	  document.currentScript = script;
+          // TODO(vsm): Find a solution for issue 8455 that works with more
+          // than one script.
+          document.currentScript = script;
           parent.replaceChild(script, scripts[i]);
         }
       }