(infobar) append link_groups if they exist.

learn.json

@@ -1800,6 +1800,6 @@
 		}]
 	},
 	"templates": {
-		"todomvc": "<header> <h3><%= name %></h3> <span class=\"source-links\"> <% examples.forEach(function (example) { %> <h5><%= example.name %></h5> <% if (!location.href.match(example.url + '/')) { %> <a class=\"demo-link\" href=\"<%= example.url %>\">Demo</a>, <% } %> <a href=\"https://github.com/tastejs/todomvc/tree/gh-pages/<%= example.source_url ? example.source_url : example.url %>\">Source</a> <% }); %> </span> </header> <hr> <blockquote class=\"quote speech-bubble\"> <p><%= description %></p> <footer> <a href=\"http://<%= homepage %>\"><%= name %></a> </footer> </blockquote> <hr> <% link_groups.forEach(function (link_group) { %> <h4><%= link_group.heading %></h4> <ul> <% link_group.links.forEach(function (link) { %> <li> <a href=\"<%= link.url %>\"><%= link.name %></a> </li> <% }); %> </ul> <% }); %> <footer> <hr> <em>If you have other helpful links to share, or find any of the links above no longer work, please <a href=\"https://github.com/tastejs/todomvc/issues\">let us know</a>.</em> </footer>"
+		"todomvc": "<header> <h3><%= name %></h3> <span class=\"source-links\"> <% if (typeof examples !== 'undefined') { %> <% examples.forEach(function (example) { %> <h5><%= example.name %></h5> <% if (!location.href.match(example.url + '/')) { %> <a class=\"demo-link\" href=\"<%= example.url %>\">Demo</a>, <% } %> <a href=\"https://github.com/tastejs/todomvc/tree/gh-pages/<%= example.source_url ? example.source_url : example.url %>\">Source</a> <% }); %> <% } %> </span> </header> <hr> <blockquote class=\"quote speech-bubble\"> <p><%= description %></p> <footer> <a href=\"http://<%= homepage %>\"><%= name %></a> </footer> </blockquote> <% if (typeof link_groups !== 'undefined') { %> <hr> <% link_groups.forEach(function (link_group) { %> <h4><%= link_group.heading %></h4> <ul> <% link_group.links.forEach(function (link) { %> <li> <a href=\"<%= link.url %>\"><%= link.name %></a> </li> <% }); %> </ul> <% }); %> <% } %> <footer> <hr> <em>If you have other helpful links to share, or find any of the links above no longer work, please <a href=\"https://github.com/tastejs/todomvc/issues\">let us know</a>.</em> </footer>"
 	}
 }