title: Escaping quotation marks in f string interpolation
body: <p>I can't get to include quotation marks in the following string interpolator:</p>
  
  <pre><code>f"foo ${math.abs(-0.9876f)*100}%1.1f%%"
  </code></pre>
  
  <p>The output is </p>
  
  <pre><code>foo 98.8%
  </code></pre>
  
  <p>Now the desired output is</p>
  
  <pre><code>foo "98.8%"
  </code></pre>
  
  <p>Inserting <code>\"</code> doesn't work, only produces "unclosed string literal" errors.</p>