RemixIconEx.Media.aspect_ratio

You're seeing just the function aspect_ratio, go back to RemixIconEx.Media module for more information.
Link to this function

aspect_ratio(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Media.aspect_ratio()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M21 3a1 1 0 0 1 1 1v16a1 1 0 0 1-1 1H3a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1h18zm-1 2H4v14h16V5zm-7 12v-2h3v-3h2v5h-5zM11 7v2H8v3H6V7h5z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}