Improve comment of isInstantiated.

pkg/compiler/lib/src/universe/universe.dart

Index: pkg/compiler/lib/src/universe/universe.dart
diff --git a/pkg/compiler/lib/src/universe/universe.dart b/pkg/compiler/lib/src/universe/universe.dart
index b731637c73338cab8bf0624d0b2a0ef1e18303dd..bd6897d1f84475a86bfa8b22bf9750ec62a4d50c 100644
--- a/pkg/compiler/lib/src/universe/universe.dart
+++ b/pkg/compiler/lib/src/universe/universe.dart
@@ -116,7 +116,9 @@ class Universe {
   Iterable<DartType> get instantiatedTypes => _instantiatedTypes;
 
   /// Returns `true` if [cls] is considered to be instantiated, either directly,
-  /// through subclasses or throught subtypes.
+  /// through subclasses or through subtypes. The latter case only contains
+  /// spurious information from instatiations through factory constructors and

[Johnni Winther, 2015/01/28 11:57:44]

instatiations -> instantiations

+  /// mixins.
   // TODO(johnniwinther): Improve semantic precision.
   bool isInstantiated(ClassElement cls) {
     return _allInstantiatedClasses.contains(cls);