title: Regex to remove spaces inside quoted text
body: <p>I need to remove all white space only within quoted sections of a string.</p>
  
  <p>Give this:
  <code>10 00,400,"a1 b2 c3 ",zz xx,100</code></p>
  
  <p>I need this: 
  <code>10 00,400,"a1b2c3",zz xx,100</code></p>
  
  <p>Obviously, restricting it to quoted areas only is why I'm having trouble.</p>
  
  <p>The strings will vary in length and can have multiple quoted sections.</p>