Basic Inline math not showing

[Tanneguy]

Hi Jim, I can't get the basic example to work : inline math is not displayed.
I have made the simplest functioning code I can think of to showcase the issue, because I can't see what I am doing wrong.
FYI we will be using extensively the parsing / rendering part of the module.

module Main exposing (..)

import Browser
import Html exposing (Html, div)
import Markdown.Option exposing (MarkdownOption(..))
import Markdown.Render as Mkdn exposing (MarkdownMsg)

type alias Model =
    String

init : ( Model, Cmd Msg )
init =
    ( math, Cmd.none )

math =
    " This is inline math : $ a^2 + b^2 = c^2 $ "

type Msg
    = MkdnMsg Mkdn.MarkdownMsg

update : Msg -> Model -> ( Model, Cmd Msg )
update _ model =
            ( model, Cmd.none )

view : Model -> Html Msg
view model =
    div []
        [ Mkdn.toHtml ExtendedMath model |> Html.map MkdnMsg ]

main : Program () Model Msg
main =
    Browser.element
        { view = view
        , init = \_ -> init
        , update = update
        , subscriptions = always Sub.none
        }