RemixIconEx.Editor.font_size_2

You're seeing just the function font_size_2, go back to RemixIconEx.Editor module for more information.
Link to this function

font_size_2(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Editor.font_size_2()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M10 6v15H8V6H2V4h14v2h-6zm8 8v7h-2v-7h-3v-2h8v2h-3z" />
</svg>

example usage

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