Dash in 20 Minutes - formatting

In the “Dash in 20 Minutes” tutorial, the following line that is used in the example code does not work:
app.layout = [html.Div(children=‘Hello World’]

This does work:
app.layout = html.Div( [html.Div(children=‘Hello World’) ]

Has Dash changed since that tutorial was created?

Hey @majudd, I actually think, the first line is just a typo.