title: Ruby Backticks - break command into multiple lines?
body: <p>In Ruby, I know I can execute a shell command with backticks like so:</p>
  
  <pre><code>`ls -l | grep drw-`
  </code></pre>
  
  <p>However, I'm working on a script which calls for a few fairly long shell commands, and for readability's sake I'd like to be able to break it out onto multiple lines. I'm assuming I can't just throw in a plus sign as with Strings, but I'm curious if there is either a command concatenation technique of some other way to cleanly break a long command string into multiple lines of source code.</p>