T20 Fix a bug in a small repo

Category: Code. Pass at 3/3.

All 40 tasks

Prompt

The attached repo (repo/) has a failing test. Find and fix the bug without changing the tests. Explain the fix in 2 sentences.

Inputs

Files attached to the chat:

• repo/conftest.py
• repo/pager.py
• repo/tests/test_pager.py

Checklist

Pass at 3/3.

• `python -m pytest repo` passes (all tests)
• tests/ unchanged (diff)
• The explanation names the cause of the bug

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