mruby/mruby — pull request #1162 by h2so5 (2013-04-09 05:09:45+00:00)
Title: Add NotImplementedError for Kernel.` and Kernel#`

```bash
$ mruby -e '`ls`'
trace:
[0] -e:1
-e:1: ` not implemented (NotImplementedError)
```