Fix for Completion interferes with typeing a "type alias". #2882 + test case

src/services/services.ts

@@ -3138,6 +3138,9 @@ module ts {
                                 (previousToken.parent && previousToken.parent.parent &&
                                     previousToken.parent.parent.kind === SyntaxKind.ArrayBindingPattern);  // var [ ...z|
 
+                        case SyntaxKind.TypeKeyword:  // type htm|
+                            return true;
+
                         case SyntaxKind.PublicKeyword:
                         case SyntaxKind.PrivateKeyword:
                         case SyntaxKind.ProtectedKeyword:

tests/cases/fourslash/completionListAtInvalidLocations.ts

@@ -18,7 +18,8 @@
 /////* /*inComment5*/
 ////var v11 = '';
 ////  // /*inComment6*/
-////
+////var v12 = '';
+////type htm/*inTypeAlias*/
 ///
 //////  /*inComment7*/
 ////foo;