RemixIconEx.Document.file_3

You're seeing just the function file_3, go back to RemixIconEx.Document module for more information.
Link to this function

file_3(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Document.file_3()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M21 8v12.993A1 1 0 0 1 20.007 22H3.993A.993.993 0 0 1 3 21.008V2.992C3 2.455 3.449 2 4.002 2h10.995L21 8zm-2 1h-5V4H5v16h14V9z" />
</svg>

example usage

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