add JsonCode example

sdk/lib/convert/json.dart

 // Copyright (c) 2013, 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.convert;
 
 /**
  * Error thrown by JSON serialization if an object cannot be serialized.
  *
  * The [unsupportedObject] field holds that object that failed to be serialized.
@@ skipping 35 matching lines @@
 
 
 /**
  * An instance of the default implementation of the [JsonCodec].
  *
  * This instance provides a convenient access to the most common JSON
  * use cases.
  *
  * Examples:
  *
- *     var encoded = JSON.encode([1, 2, { "a": null }]);
- *     var decoded = JSON.decode('["foo", { "bar": 499 }]');
+ *    var encoded = JSON.encode([1, 2, { "a": null }]);

[Lasse Reichstein Nielsen, 2015/09/30 06:20:31]

Make sure this is indented enough. It seems to be indented only 3 if the first
space after "*" isn't counted. I'd prefer to indent it by four relative to the
other text, just to be sure (and so it's obvious that it's code-formatted).

+ *    var decoded = JSON.decode('["foo", { "bar": 499 }]');
  */
 const JsonCodec JSON = const JsonCodec();
 
 typedef _Reviver(var key, var value);
 typedef _ToEncodable(var o);
 
 
 /**
  * A [JsonCodec] encodes JSON objects to strings and decodes strings to
  * JSON objects.
+ *
+ * Examples:
+ *
+ *    var encoded = JSON.encode([1, 2, { "a": null }]);
+ *    var decoded = JSON.decode('["foo", { "bar": 499 }]');
  */
 class JsonCodec extends Codec<Object, String> {
   final _Reviver _reviver;
   final _ToEncodable _toEncodable;
 
   /**
    * Creates a `JsonCodec` with the given reviver and encoding function.
    *
    * The [reviver] function is called during decoding. It is invoked
    * once for each object or list property that has been parsed.
@@ skipping 978 matching lines @@
         buffer.setRange(index, end, indent);
         index = end;
       } else {
         for (int i = 0; i < indentLength; i++) {
           writeByte(indent[i]);
         }
       }
     }
   }
 }