Spelling fixes e to i.

pkg/compiler/lib/src/js_emitter/type_test_registry.dart

 // Copyright (c) 2014, 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.
 
 library dart2js.js_emitter.type_test_registry;
 
 import '../common.dart';
 import '../common_elements.dart';
 import '../elements/elements.dart' show ClassElement, MethodElement;
 import '../elements/entities.dart';
@@ skipping 16 matching lines @@
 
   /**
    * Raw ClassElement symbols occurring in is-checks and type assertions.  If the
    * program contains parameterized checks `x is Set<int>` and
    * `x is Set<String>` then the ClassElement `Set` will occur once in
    * [checkedClasses].
    */
   Set<ClassEntity> checkedClasses;
 
   /**
-   * The set of function types that checked, both explicity through tests of
+   * The set of function types that checked, both explicitly through tests of
    * typedefs and implicitly through type annotations in checked mode.
    */
   Set<FunctionType> checkedFunctionTypes;
 
   /// After [computeNeededClasses] this set only contains classes that are only
   /// used for RTI.
   Set<ClassEntity> _rtiNeededClasses;
 
   Iterable<ClassEntity> cachedClassesUsingTypeVariableTests;
 
@@ skipping 143 matching lines @@
     checkedFunctionTypes = new Set<FunctionType>();
     _codegenWorldBuilder.isChecks.forEach((DartType t) {
       if (t is InterfaceType) {
         checkedClasses.add(t.element);
       } else if (t is FunctionType) {
         checkedFunctionTypes.add(t);
       }
     });
   }
 }