title: regex space or start of input, space or end of input
body: <p>I'm trying to match parts of a larger block of content and want to only match things at the start of the string or that are preceded by a space and I only want to match things that end at the end of string or are followed by a space. Unfortunately, my regex-fu is a bit too weak to figure this out on my own. Help me Stack Overflow, you are my only hope.</p>
  
  <p>Basically these should all match "the-thing-to-match";</p>
  
  <pre><code>the-thing-to-match blah
  blah the-thing-to-match
  blah the-thing-to-match blah
  </code></pre>