Spelling fixes e to i.

tests/compiler/dart2js_extra/switch_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
 
 switcher(val) {
   var x = 0;
   switch (val) {
     case 1:
       x = 100;
       break;
     case 2:
       x = 200;
       break;
     case 3:
       x = 300;
       break;
     default:
       return 400;
       break; // Intentional dead code (regression test for crash).
   }
   return x;
 }
 
-// Check unambiguated grammar allowing multiple lables per case/default.
+// Check unambiguated grammar allowing multiple labels per case/default.
 switcher2(val) {
   var x = 0;
   switch (val) {
     foo:
     bar:
     case 1:
     baz:
     case 2:
       fez:
       {
@@ skipping 57 matching lines @@
   Expect.equals(100, switcher2(2));
   Expect.equals(200, switcher2(3));
   Expect.equals(200, switcher2(4));
   Expect.equals(200, switcher2(5));
 
   switcher3(1);
   Expect.equals(1, x);
 
   badswitches(42);
 }