ruby/ruby — pull request #489 by ZhangHanDong (2013-12-26 13:32:08+00:00)
Title: Update refinements.rdoc

modify doc error:

```ruby
using M
x = C.new
c.foo # prints "C#foo in M"
```
change to:
```ruby
using M
x = C.new
x.foo # prints "C#foo in M"
```