Fix a repeated spelling error

pkg/analyzer/lib/src/generated/error.dart

 // Copyright (c) 2014, 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 engine.error;
 
 import 'dart:collection';
 
 import 'ast.dart' show AstNode;
 import 'element.dart';
@@ skipping 584 matching lines @@
       const CompileTimeErrorCode('CONFLICTING_CONSTRUCTOR_NAME_AND_METHOD',
           "'{0}' cannot be used to name a constructor and a method in this class");
 
   /**
    * 7. Classes: It is a compile time error if a generic class declares a type
    * variable with the same name as the class or any of its members or
    * constructors.
    */
   static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_CLASS =
       const CompileTimeErrorCode('CONFLICTING_TYPE_VARIABLE_AND_CLASS',
-          "'{0}' cannot be used to name a type varaible in a class with the same name");
+          "'{0}' cannot be used to name a type variable in a class with the same name");
 
   /**
    * 7. Classes: It is a compile time error if a generic class declares a type
    * variable with the same name as the class or any of its members or
    * constructors.
    */
   static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_MEMBER =
       const CompileTimeErrorCode('CONFLICTING_TYPE_VARIABLE_AND_MEMBER',
-          "'{0}' cannot be used to name a type varaible and member in this class");
+          "'{0}' cannot be used to name a type variable and member in this class");
 
   /**
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant
    * object results in an uncaught exception being thrown.
    */
   static const CompileTimeErrorCode CONST_CONSTRUCTOR_THROWS_EXCEPTION =
       const CompileTimeErrorCode('CONST_CONSTRUCTOR_THROWS_EXCEPTION',
           "'const' constructors cannot throw exceptions");
 
   /**
@@ skipping 2465 matching lines @@
       "The exception variable '{0}' is not used, so the 'catch' clause can be removed");
 
   /**
    * Unused catch stack trace variables.
    */
   static const HintCode UNUSED_CATCH_STACK = const HintCode(
       'UNUSED_CATCH_STACK',
       "The stack trace variable '{0}' is not used and can be removed");
 
   /**
-   * Unused local variables are local varaibles which are never read.
+   * Unused local variables are local variables which are never read.
    */
   static const HintCode UNUSED_LOCAL_VARIABLE = const HintCode(
       'UNUSED_LOCAL_VARIABLE',
       "The value of the local variable '{0}' is not used");
 
   /**
    * Hint for cases where the source expects a method or function to return a
    * non-void result, but the method or function signature returns void.
    *
    * Parameters:
@@ skipping 1888 matching lines @@
    * Initialize a newly created error code to have the given [name].
    */
   const TodoCode(String name) : super(name, "{0}");
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   ErrorType get type => ErrorType.TODO;
 }