Spelling fixes e to i.

tests/compiler/dart2js/kernel/constructors_test.dart

 // Copyright (c) 2016, 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:compiler/src/compiler.dart' show Compiler;
 import 'package:compiler/src/elements/elements.dart';
 import 'package:test/test.dart';
 
 import 'helper.dart' show check;
 
@@ skipping 30 matching lines @@
   const Foo({int number: 0}) : this.poodle(number * 2);
   const Foo.poodle(this.value);
 }
 
 main() => new Foo(number: 3);
 ''';
     return check(code, lookup: defaultConstructorFor('Foo'));
   });
 
   // TODO(efortuna): Kernel needs to have some additional constructor
-  // implementaion work before this is legitimately equivalent code to the
+  // implementation work before this is legitimately equivalent code to the
   // original AST.
 /*  test('initialized field and constructor', () {
     String code = '''
 import 'dart:_foreign_helper' show JS, JS_EMBEDDED_GLOBAL;
 import 'package:expect/expect.dart';
 
 
 class Foo {
   final value = JS('bool', '#()', JS_EMBEDDED_GLOBAL('', 'foo'));
   Foo() {
     print('hello world');
   }
 }
 
 main() => new Foo();
 ''';
     return check(code, lookup: defaultConstructorFor('Foo'));
   });*/
 }
 
 defaultConstructorFor(String className) => (Compiler compiler) {
       LibraryElement mainApp =
           compiler.frontendStrategy.elementEnvironment.mainLibrary;
       ClassElement clazz = mainApp.find(className);
       return clazz.lookupDefaultConstructor();
     };