title: How do I make link_to open external URLs in a new window?
body: <p>I need to convert a rails 2.3 site so that all external URLs open in a new window.  I could go though every call to <code>link_to</code> and add <code>:target =&gt; '_blank'</code>, but I'd like to do it in one step for all links, present and future.  Is there a way I can monkey patch link_to to get the desired behaviour?</p>