rails/rails — pull request #9103 by zmoazeni (2013-01-29 02:11:46+00:00)
Title: Changes encoding of JSON dictionaries and arrays to use UTF-8

This makes sense considering strings are forced to UTF-8 encoding. This
eliminates rails code that looks like:

```
def show
respond_to do |format|
format.json do
render :json => {"foo" => "bar"}.to_json.force_encoding("utf-8")
end
end
end
```