Fix typos in cookbook/testing/database
bug #3463 Fix typos in cookbook/testing/database (ifdattic)

This PR was merged into the 2.3 branch.

Discussion
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Fix typos in cookbook/testing/database

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets |

Commits
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b1a4f29 Fix typos in cookbook/testing/database