New tests and improvements for generics in comments parsing.

pkg/analyzer/lib/src/fasta/ast_builder.dart

Index: pkg/analyzer/lib/src/fasta/ast_builder.dart
diff --git a/pkg/analyzer/lib/src/fasta/ast_builder.dart b/pkg/analyzer/lib/src/fasta/ast_builder.dart
index a49b372d46c16ff4ff500f0306f104a228272a36..70a7539d3cd64b939cd03f22ad0543f247a48767 100644
--- a/pkg/analyzer/lib/src/fasta/ast_builder.dart
+++ b/pkg/analyzer/lib/src/fasta/ast_builder.dart
@@ -1938,6 +1938,11 @@ class AstBuilder extends ScopeListener {
     return tokenToStartReplacing;
   }
 
+  @override
+  void discardTypeReplacedWithCommentTypeAssign() {

[Paul Berry, 2017/05/01 18:24:42]

Do we need to add a similar override to BodyBuilder?  (To handle '/*=Type*/'
appearing inside a method body)

+    pop();
+  }
+
   /// Check if the given [token] has a comment token with the given [info],
   /// which should be either [TokenType.GENERIC_METHOD_TYPE_ASSIGN] or
   /// [TokenType.GENERIC_METHOD_TYPE_LIST].  If found, parse the comment