Replace Order with Book in "Creating Namespaced Models" section of docs for consistency
Created by: asavageiv
Motivation / Background
This Pull Request has been created because the documentation is improved by consistently using the same model names throughout. https://github.com/rails/rails/pull/51226#discussion_r1527578109
Detail
This Pull Request changes the Active Record Basics Guide "Creating Namespaced Models" section to use Book instead of Order in the examples, consistent with the rest of the document.
Checklist
Before submitting the PR make sure the following are checked:
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This Pull Request is related to one change. Unrelated changes should be opened in separate PRs. -
Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
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Tests are added or updated if you fix a bug or add a feature. -
CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature. Minor bug fixes and documentation changes should not be included.