Dart SDK Spelling b, c, and d.

tests/compiler/dart2js/constant_expression_test.dart

 // Copyright (c) 2015, 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 constant_expression_test;
 
 import 'dart:async';
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
 import 'package:compiler/src/constants/expressions.dart';
@@ skipping 199 matching lines @@
       memorySourceFiles: {'main.dart': source}, options: ['--analyze-all']);
   Compiler compiler = result.compiler;
   MemoryEnvironment environment = new MemoryEnvironment(compiler);
   var library = compiler.mainApp;
   constants.forEach((String name, ConstantData data) {
     FieldElement field = library.localLookup(name);
     var constant = field.constant;
     Expect.equals(
         data.kind,
         constant.kind,
-        "Unexpected kind '${constant.kind}' for contant "
+        "Unexpected kind '${constant.kind}' for constant "
         "`${constant.toDartText()}`, expected '${data.kind}'.");
     Expect.equals(
         data.text,
         constant.toDartText(),
-        "Unexpected text '${constant.toDartText()}' for contant, "
+        "Unexpected text '${constant.toDartText()}' for constant, "
         "expected '${data.text}'.");
     if (data.type != null) {
       String instanceType =
           constant.computeInstanceType(environment).toString();
       Expect.equals(
           data.type,
           instanceType,
-          "Unexpected type '$instanceType' for contant "
+          "Unexpected type '$instanceType' for constant "
           "`${constant.toDartText()}`, expected '${data.type}'.");
     }
     if (data.fields != null) {
       Map instanceFields = constant.computeInstanceFields(environment);
       Expect.equals(
           data.fields.length,
           instanceFields.length,
-          "Unexpected field count ${instanceFields.length} for contant "
+          "Unexpected field count ${instanceFields.length} for constant "
           "`${constant.toDartText()}`, expected '${data.fields.length}'.");
       instanceFields.forEach((field, expression) {
         String name = '$field';
         String expression = instanceFields[field].toDartText();
         String expected = data.fields[name];
         Expect.equals(
             expected,
             expression,
             "Unexpected field expression ${expression} for field '$name' in "
-            "contant `${constant.toDartText()}`, expected '${expected}'.");
+            "constant `${constant.toDartText()}`, expected '${expected}'.");
       });
     }
   });
 }