petdance/ack — pull request #214 by rsimoes (2012-03-14 20:33:55+00:00)
Title: Provide an option to set the re::engine to be used searches

The attached patch adds and documents this option:

```pod
=item B<--re-engine=name>

Use an alternative regular expression engine when searching. Pass the option,
e.g., "RE2" to load and use L.
```