rails/rails — pull request #3937 by kennyj (2011-12-11 15:44:07+00:00)
Title: Add silence_warnings block (GH #3927)

Now, we got the follow warning:

```
path to/activesupport/lib/active_support/core_ext/string/output_safety.rb:23: warning: regexp match /.../n against to UTF-8 string
```

This PR fix it.
Please see https://github.com/rails/rails/issues/3927 .
I wrote an another fixing plan, and a performance test result.