mruby/mruby — pull request #1662 by h2so5 (2014-01-21 12:44:52+00:00)
Title: escape non-ascii characters correctly in String#inspect

String#inspect returns wrong octal strings because of a cast problem.
```ruby
puts "\xA0".dump
puts "\xA0".inspect
```

```ruby
"\240"
"\640"
```