RemixIconEx.Document.file_pdf

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

file_pdf(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Document.file_pdf()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 16H8V8h4a4 4 0 1 1 0 8zm-2-6v4h2a2 2 0 1 0 0-4h-2zm5-6H5v16h14V8h-4V4zM3 2.992C3 2.444 3.447 2 3.999 2H16l5 5v13.993A1 1 0 0 1 20.007 22H3.993A1 1 0 0 1 3 21.008V2.992z" />
</svg>

example usage

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