mruby/mruby — pull request #1310 by sogabe (2013-06-27 08:34:14+00:00)
Title: Avoid read_escape() in case of regexp

This patch fixes wrong interpretation of regexp with escape characters.

We tested the patch on mruby with mruby-regexp-pcre.

Previous version:
```ruby
"\t" =~ /\s/
=> nil
```

Fixed version:
```ruby
"\t" =~ /\s/
=> 0
```