Exercise 3: Three Unverified Points — Possible Solution
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TASK
List three things about Xcode's source control this chapter could not verify,
and say where you would check each.

ANSWER
1. The current layout of the Source Control navigator and menus.
   Check: Apple's Xcode documentation and release notes for your version.
2. How Xcode authenticates to a hosting service such as GitHub, and the
   current Push steps.
   Check: the Accounts settings and the Source Control menu in your own
   Xcode, and the hosting service's documentation.
3. Which files should be ignored for an Xcode project.
   Check: current guidance from Apple and your team's practice, then test on
   a clean clone.

ALSO UNVERIFIED
How "Discard All Changes" behaves in a current Xcode; the chapter warns
that it discards uncommitted work.