9.1.1 Edit form
9.1.4 Successful edits (with TDD)
9.2.1 Requiring logged-in users
9.2.2 Requiring the right user
9.2.3 Friendly forwarding
9.3.1 Users index
9.3.2 Sample users
9.3.3 Pagination
9.3.4 Users index test
9.3.5 Partial refactoring
9.4.1 Administrative users
9.4.3 User destroy tests