README.md in json_pure-2.1.0 vs README.md in json_pure-2.2.0

@@ -1,8 +1,9 @@
-# JSON implementation for Ruby ![Travis Widget]
-[Travis Widget]: http://travis-ci.org/flori/json.svg?branch=master
+# JSON implementation for Ruby
 
+[![Travis Widget](http://travis-ci.org/flori/json.svg?branch=master)](https://travis-ci.org/flori/json)
+
 ## Description
 
 This is a implementation of the JSON specification according to RFC 7159
 http://www.ietf.org/rfc/rfc7159.txt . Starting from version 1.0.0 on there
 will be two variants available:
@@ -148,10 +149,22 @@
 ```
 
 Both of the additions attempt to require `'json'` (like above) first, if it has
 not been required yet.
 
+## Serializing exceptions
+
+The JSON module doesn't extend `Exception` by default. If you convert an `Exception`
+object to JSON, it will by default only include the exception message.
+
+To include the full details, you must either load the `json/add/core` mentioned
+above, or specifically load the exception addition:
+
+```ruby
+require 'json/add/exception'
+```
+
 ## More Examples
 
 To create a JSON document from a ruby data structure, you can call
 `JSON.generate` like that:
 
@@ -177,44 +190,48 @@
 simply implementing a more specialized version of the `#to_json method`, that
 should return a JSON object (a hash converted to JSON with `#to_json`) like
 this (don't forget the `*a` for all the arguments):
 
 ```ruby
- class Range
-   def to_json(*a)
-     {
-       'json_class'   => self.class.name, # = 'Range'
-       'data'         => [ first, last, exclude_end? ]
-     }.to_json(*a)
-   end
- end
+class Range
+  def to_json(*a)
+    {
+      'json_class'   => self.class.name, # = 'Range'
+      'data'         => [ first, last, exclude_end? ]
+    }.to_json(*a)
+  end
+end
 ```
 
 The hash key `json_class` is the class, that will be asked to deserialise the
 JSON representation later. In this case it's `Range`, but any namespace of
 the form `A::B` or `::A::B` will do. All other keys are arbitrary and can be
 used to store the necessary data to configure the object to be deserialised.
 
-If a the key `json_class` is found in a JSON object, the JSON parser checks
+If the key `json_class` is found in a JSON object, the JSON parser checks
 if the given class responds to the `json_create` class method. If so, it is
 called with the JSON object converted to a Ruby hash. So a range can
 be deserialised by implementing `Range.json_create` like this:
 
 ```ruby
- class Range
-   def self.json_create(o)
-     new(*o['data'])
-   end
- end
+class Range
+  def self.json_create(o)
+    new(*o['data'])
+  end
+end
 ```
 
 Now it possible to serialise/deserialise ranges as well:
 
 ```ruby
- json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
- # => "[1,2,{\"a\":3.141},false,true,null,{\"json_class\":\"Range\",\"data\":[4,10,false]}]"
- JSON.parse json
- # => [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
+json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
+# => "[1,2,{\"a\":3.141},false,true,null,{\"json_class\":\"Range\",\"data\":[4,10,false]}]"
+JSON.parse json
+# => [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
+json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
+# => "[1,2,{\"a\":3.141},false,true,null,{\"json_class\":\"Range\",\"data\":[4,10,false]}]"
+JSON.parse json, :create_additions => true
+# => [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
 ```
 
 `JSON.generate` always creates the shortest possible string representation of a
 ruby data structure in one line. This is good for data storage or network
 protocols, but not so good for humans to read. Fortunately there's also