Spelling fixes e to i.

pkg/kernel/lib/ast.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.
 
 /// -----------------------------------------------------------------------
 ///                           ERROR HANDLING
 /// -----------------------------------------------------------------------
 ///
 /// As a rule of thumb, errors that can be detected statically are handled by
 /// the frontend, typically by translating the erroneous code into a 'throw' or
@@ skipping 1533 matching lines @@
   /// Should only be used on code compiled in strong mode, as this method
   /// assumes the IR is strongly typed.
   DartType getStaticType(TypeEnvironment types);
 
   /// Returns the static type of the expression as an instantiation of
   /// [superclass].
   ///
   /// Should only be used on code compiled in strong mode, as this method
   /// assumes the IR is strongly typed.
   ///
-  /// This method futhermore assumes that the type of the expression actually
+  /// This method furthermore assumes that the type of the expression actually
   /// is a subtype of (some instantiation of) the given [superclass].
   /// If this is not the case, either an exception is thrown or the raw type of
   /// [superclass] is returned.
   InterfaceType getStaticTypeAsInstanceOf(
       Class superclass, TypeEnvironment types) {
     // This method assumes the program is correctly typed, so if the superclass
     // is not generic, we can just return its raw type without computing the
     // type of this expression.  It also ensures that all types are considered
     // subtypes of Object (not just interface types), and function types are
     // considered subtypes of Function.
@@ skipping 3051 matching lines @@
 /// typedef has not been assigned a canonical name yet.
 ///
 /// Returns `null` if the typedef is `null`.
 CanonicalName getCanonicalNameOfTypedef(Typedef typedef_) {
   if (typedef_ == null) return null;
   if (typedef_.canonicalName == null) {
     throw '$typedef_ has no canonical name';
   }
   return typedef_.canonicalName;
 }