title: Place a comma and a space before every word with a capital letter
body: <p>I'm working with ruby and I'm trying to place a comma and a space before every word with a capital letter apart from the beginning word.</p>
  
  <pre><code>str = Taxonomy term Another term One more
  
  puts str.gsub(/\s/, ', ')
  </code></pre>
  
  <p>Output > <code>Taxonomy, term, Another, term, One, more</code></p>
  
  <p>Desired output > <code>Taxonomy term, Another term, One more</code></p>
  
  <p>My regex skills are very rusty so im simply stuck at this stage.</p>
  
  <p>Any idea how to reach my desired output?</p>