RemixIconEx.Development.code

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

code(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Development.code()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M23 12l-7.071 7.071-1.414-1.414L20.172 12l-5.657-5.657 1.414-1.414L23 12zM3.828 12l5.657 5.657-1.414 1.414L1 12l7.071-7.071 1.414 1.414L3.828 12z" />
</svg>

example usage

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