Colon is missing when using in Vue templates

🐛 Bug Report

Colon is missing when using special scenes in Vue templates

To Reproduce

Steps to reproduce the behavior:

<div id="app">
  <prism-editor :xlink:href="'myHref'" />
</div>

Expected behavior

<div id="app">
  <prism-editor :xlink:href="'myHref'"/>
</div>

Actual result

<div id="app">
  <!-- : before xlink is missing here -->
  <prism-editor xlink:href="'myHref'"/>
</div>

Context

• Angular
• Svelte
• Vue
• Riot
• HTML5 only

Your Environment

• Prettyhtml version: https://prettyhtml.netlify.com/ OR vetur (vs code plugin "vetur.format.defaultFormatter.html": "prettyhtml")
• NodeJs version:
• Environment name and version:
• Operating System and version: