minor - comments only

Author: Tim Berners-Lee

lib/signin.js

@@ -229,7 +229,9 @@ UI.widgets.ensureTypeIndexes = function(context) {
   }) // Promise
 } // ensureTypeIndexes
 
-// Returns promise of array of symbols
+// Returns promise of context with arrays of symbols
+//   context.instances
+//   context.containers
 //
 UI.widgets.findAppInstances = function(context, klass) {
     return new Promise(function(resolve, reject){