"Last 20 lines" of log file should not be truncated to console width

[mattbrictson]

If something goes wrong during a Capistrano deployment, Airbrussh prints a message like this:

** DEPLOY FAILED
** Refer to log/capistrano.log for details. Here are the last 20 lines:

[[snip]]

However, Airbrussh honors the :truncate setting when printing these last 20 lines. In other words, by default these lines will be cut off with an … character based on the console width. This severely limits the troubleshooting utility of this output.

I consider this a bug. Airbrussh should never truncate the output when displaying the tail of the log file.