gistfile1.html

<div pv-attrs="style.width: {{play_progress}} title: {{full_name}} style.background-image: {{album_cover_url}}">
</div>

just more line breaks:

<div
  pv-attrs="
    style.width: {{play_progress}}
    title: {{full_name}}
    style.background-image: {{album_cover_url}}"
  >
</div>