Spelling fixes e to i.

tests/language/named_parameters_aggregated_test.dart

 // Copyright (c) 2011, 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.
 // Dart test program for testing named parameters.
 
 import "package:expect/expect.dart";
 
 class TypeTester<T> {}
 
 // Expect compile-time error as no default values are allowed
@@ skipping 23 matching lines @@
     _handler = cb;
   }
 }
 
 main() {
   // Expect compile-time error due to missing comma in function definition.
   NamedParametersAggregatedTests.f_missing_comma(10
     , 25 //# 02: continued
       );
 
-  // Expect compile-time erorr due to duplicate named argument.
+  // Expect compile-time error due to duplicate named argument.
   NamedParametersAggregatedTests.F31(10, b: 25
     , b:35 //# 04: compile-time error
     , b:35, b:45 //# 06: compile-time error
       );
 
   // Expect compile-time error due to missing positional argument.
   Expect.throws(() => NamedParametersAggregatedTests.F31(b:25, c:35), (e) => e is NoSuchMethodError); //# 05: static type warning
 
   new TypeTester<Callback>();
 
   (new NamedParametersAggregatedTests()).InstallCallback(null);
 }