From: Andrew Stewart <boss@...>
Date: 2007-03-22T23:43:15+09:00
Subject: Knocking Lines Out Of A Multiline String

Hello,

What's a (good!) way to remove lines matching a pattern from a  
multiline string?

For example, I would like to remove lines matching /usr/local/lib  
from the multiline string:

     /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/ 
action_controller/test_process.rb:382:in `process'
     /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/ 
action_controller/test_process.rb:353:in `post'
     test/functional/orders_controller_test.rb:241:in  
`test_should_handle_errors_on_edit'

...to give:

     test/functional/orders_controller_test.rb:241:in  
`test_should_handle_errors_on_edit'

I tried matching the pattern-to-remove with gsub and substituting an  
empty string, but that leaves me with lots of blank lines and not  
really any nearer to the answer.

Thanks and regards,
Andy Stewart