Dart SDK Spelling b, c, and d.

pkg/kernel/lib/frontend/super_initializers.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.
 
 /// A library to help move super calls last in the initializer list.
 library kernel.frontend.super_calls;
 
 import '../ast.dart';
 
 /// Mutates the initializer list of [node] so that its super initializer occurs
@@ skipping 15 matching lines @@
   if (superIndex == -1) return;
   SuperInitializer superCall = initializers[superIndex];
   Arguments arguments = superCall.arguments;
   int argumentCount = arguments.positional.length + arguments.named.length;
 
   // We move all initializers after the super call to the place where the super
   // call was, but reserve [argumentCount] slots before that for
   // [LocalInitializer]s.
   initializers.length += argumentCount;
   initializers.setRange(
-      superIndex + argumentCount, // desination start (inclusive)
-      initializers.length - 1, // desination end (exclusive)
+      superIndex + argumentCount, // destination start (inclusive)
+      initializers.length - 1, // destination end (exclusive)
       initializers, // source list
       superIndex + 1); // source start index
   initializers[initializers.length - 1] = superCall;
 
   // Fill in the [argumentCount] reserved slots with the evaluation expressions
   // of the arguments to the super constructor call.
   int storeIndex = superIndex;
   for (int i = 0; i < arguments.positional.length; ++i) {
     var variable = new VariableDeclaration.forValue(arguments.positional[i]);
     arguments.positional[i] = new VariableGet(variable)..parent = arguments;
     initializers[storeIndex++] = new LocalInitializer(variable)..parent = node;
   }
   for (int i = 0; i < arguments.named.length; ++i) {
     NamedExpression argument = arguments.named[i];
     var variable = new VariableDeclaration.forValue(argument.value);
     arguments.named[i].value = new VariableGet(variable)..parent = argument;
     initializers[storeIndex++] = new LocalInitializer(variable)..parent = node;
   }
 }