Format all dart: library files

sdk/lib/core/exceptions.dart

 // Copyright (c) 2012, 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.
 
 part of dart.core;
 
 // Exceptions are thrown either by the VM or from Dart code.
 
 /**
  * A marker interface implemented by all core library exceptions.
  *
  * An [Exception] is intended to convey information to the user about a failure,
  * so that the error can be addressed programmatically. It is intended to be
  * caught, and it should contain useful data fields.
  *
  * Creating instances of [Exception] directly with [:new Exception("message"):]
  * is discouraged, and only included as a temporary measure during development,
  * until the actual exceptions used by a library are done.
  */
 abstract class Exception {
   factory Exception([var message]) => new _Exception(message);
 }
 
-
 /** Default implementation of [Exception] which carries a message. */
 class _Exception implements Exception {
   final message;
 
   _Exception([this.message]);
 
   String toString() {
     if (message == null) return "Exception";
     return "Exception: $message";
   }
 }
 
-
 /**
  * Exception thrown when a string or some other data does not have an expected
  * format and cannot be parsed or processed.
  */
 class FormatException implements Exception {
   /**
    * A message describing the format error.
    */
   final String message;
 
@@ skipping 124 matching lines @@
     int markOffset = offset - start + prefix.length;
     return "$report$prefix$slice$postfix\n${" " * markOffset}^\n";
   }
 }
 
 // Exception thrown when doing integer division with a zero divisor.
 class IntegerDivisionByZeroException implements Exception {
   const IntegerDivisionByZeroException();
   String toString() => "IntegerDivisionByZeroException";
 }