Wrong 'step' configuration in data_viz_to_coder ex1

[franpog859]

Description:

In the Data Visualization: from Non-Coder to Coder tutorial in the first exercise (Exercise: Hello, Seaborn) in the third step (Review the data) the step_3.check() does not work
Also step_4.a.check() and step_4.b.check() does not work correctly. If it's changed to step_3.a.check() and step_3.b.check() it works good. step_3 still points to the fourth step - Plot the data

I think it could be the problem provided in this commit. As far as I can see it adds the "Review the data" step

What should be done:

Checking, hinting and solving provided problems works correctly in all tutorial exercise steps

[franpog859]

It's a duplicate. See the opened issue