title: What does ' ' (tow single quotations marks, one after the other, not the double that come together) do?
body: <p>I'm printing this in Python (3.6)</p>
  
  <pre><code>print(' 'f' ')
  </code></pre>
  
  <p>and it shows nothing!
  What is happening?</p>
  
  <p>It sounds like whatever I put inside the inner ' ', vanish.</p>