RemixIconEx.Design.markup

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

markup(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Design.markup()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M10 10.5l1.038-3.635a1 1 0 0 1 1.924 0L14 10.5V12h.72a1 1 0 0 1 .97.757l1.361 5.447a8 8 0 1 0-10.102 0l1.362-5.447A1 1 0 0 1 9.28 12H10v-1.5zm2 9.5a7.952 7.952 0 0 0 3.265-.694L13.938 14h-3.876l-1.327 5.306A7.95 7.95 0 0 0 12 20zm0 2C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10z" />
</svg>

example usage

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