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Issue description

Step 2 of the guided exercise "managing inventory variables" (ch05s06) instructs to "Move those two variables into inventory variable files".

However the steps that follow move those variables into playbook variable files. Either the text or the steps need to be adjusted so that what is being done matches the instructions.

 
There is a subtle difference between a playbook and an inventory variable that is well explained here: https://medium.com/opsops/the-subtlety-of-group-vars-directory-8687d1405bad

Steps to reproduce:

Workaround:

Expected result: