<!DOCTYPE html>
<html>
  <body>
    <span>First line
      <span style="border: 5px solid blue; border-right: none"></span>
    </span>
    <div>Second line</div>
    <span>
      <span style="border: 5px solid blue; border-left: none"></span>
      Third line, yes
    </span>
  </body>
</html>