title: regexp: tw- prefixed words with optional quotation marks
body: <p>I am struggling to build a regexp to catch words starting in tw (or Tw, or TW) whether they are in between quotes (single or double) or not.
  So far '\b[tT][wW][a-zA-Z0-9]*' catches all the tw, Tw, and TW starting words but misses the ones in btw single or double quotes.
  It finds both tweeple and TWEEPLE but not 'tweeple' nor "TWEEPLE".</p>
  
  <p>Help much appreciated.</p>