Spelling fixes e to i.

pkg/analyzer/lib/src/summary/fasta/summary_builder.dart

 // Copyright (c) 2017, 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.
 
 /// Logic to build unlinked summaries.
 library summary.src.summary_builder;
 
 import 'package:front_end/src/fasta/parser.dart'
     show
         ClassMemberParser,
@@ skipping 164 matching lines @@
   //  push(new Invalid(hint: 'cascades'));
   //}
 
   void _unhandledSend() {
     push(new Invalid(hint: "call"));
   }
 }
 
 // bit-masks to encode async modifiers as bits on an int.
 
-/// Parser listener to build simplified AST expresions.
+/// Parser listener to build simplified AST expressions.
 ///
 /// The parser produces different trees depending on whether it is used for
 /// constants or initializers, so subclasses specialize the logic accordingly.
 abstract class ExpressionListener extends StackListener {
   // Underlying parser that invokes this listener.
   static const _invariantCheckToken = "invariant check: starting a function";
 
   int _withinFunction = 0;
 
   int _withinCascades = 0;
 
   /// Whether this listener is used to build const expressions.
   bool get forConst => false;
 
-  /// Whether to ignore the next reduction. Used to ignore nested expresions
+  /// Whether to ignore the next reduction. Used to ignore nested expressions
   /// that are either invalid (in constants) or unnecessary (for initializers).
   bool get ignore => _withinFunction > 0 || _withinCascades > 0;
 
   Parser get parser;
 
   void beginCascade(Token token) {
     _withinCascades++;
   }
 
   void beginFunctionDeclaration(token) {
@@ skipping 1349 matching lines @@
 }
 
 /// Internal representation of an initialized name.
 class _InitializedName {
   final String name;
   final UnlinkedExecutableBuilder initializer;
   _InitializedName(this.name, this.initializer);
 
   toString() => "II:" + (initializer != null ? "$name = $initializer" : name);
 }