As the Angular.js docs say:
" To allow indexing of your AJAX application, you have to add special meta tag in the head section of your document:
<meta name="fragment" content="!" />
This will cause crawler bot to request links with escaped_fragment param so that your server can recognize the crawler and serve a HTML snapshots. "
I think it'd be beneficial for us to have this very small changed implemented. Here is the link to the angular doc: https://docs.angularjs.org/guide/$location