title: How to search for occurrences of more than one space between words in a line
body: <p>How to search for occurrences of more than one space between words in a line</p>
  <pre class="lang-none prettyprint-override"><code>1. this is a line containing  2 spaces
  2. this is a line containing   3 spaces
  3. this is a line containing multiple spaces first  second   three   four
  </code></pre>
  <p>All the above are valid matches for this regex. What regex should I use?</p>