Margin properties: 'margin-top',  'margin-right',  'margin-bottom', 'margin-left', and 'margin'">
 </head>
 <body>
  <p>The three diagrams below should be identical:</p>
  <p class="test"> xxx xxx <span class="one">xxx xxx</span> xxx xxx </p>
  <p class="test"> xxx xxx <span class="two">xxx xxx</span> xxx xxx </p>
  <div>
     <img width="48" alt="" src="support/swatch-orange.png" height="48"><img width="16" alt="" src="support/swatch-lime.png" class="b" height="16"><img width="48" alt="" src="support/swatc