title: Rails QRCode rendered as HTML table
body: <p>Searching for Rails QRCoding, I met <a href="https://stackoverflow.com/questions/7577669/rqrcode-error-for-ruby-on-rails">Rails QRCode</a>
   I really liked the rendering of QRCode as an HTML table, but, although  I use following styles to define black and white cells,</p>
  
  <pre><code>.black {border-left: solid 1px #000; border-right: solid 1px #000;} 
  .white {border-left: solid 1px #fff; border-right: solid 1px #fff;} 
  </code></pre>
  
  <p>The resulting QRCode is not readable at all :( ....any suggestions about my missunderstanding of QRCodes like this shown by <a href="https://stackoverflow.com/users/783437/user783437">user783437</a></p>