title: Unix Bash script to embolden/underline/italicize specific text
body: <p>I've been trawling the web trying to find examples of Unix Bash script that can handle basic text styling (bold/underline/italics), but can't find anything? Is such a thing possible to do?</p>
  
  <p>For example:  </p>
  
  <ol>
  <li>Embolden/Underline/Italicize all lines ending in ":"? </li>
  <li>(Turn off) Embolden/Underline/Italicize all lines ending in ":"?</li>
  </ol>
  
  <p>I want to set it up as a Service via Automator; so using <code>/bin/bash</code> and actioning on "selected text" (in a rich-text-compatible file, of course).</p>