Historical Fundamental Data Examples

[DerekMelchin]

Expected Behavior

The code snippet in https://www.quantconnect.com/docs/v2/writing-algorithms/datasets/morningstar/us-fundamental-data#08-Historical-Data works

Actual Behavior

• The code snippet for algorithms is using qb instead of self.
• There might need to be another example that uses

  self.History(Fundamentals, timedelta(30))

  (test if it works)

Checklist

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• [x] I have confirmed that this issue exists on the current master branch
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