Fix trailing whitespace in AGENTS.md causing pre-commit hook failures in PR #3 (#4)

* Initial plan

* Fix trailing whitespace in AGENTS.md docstring example

Co-authored-by: ianlintner <500914+ianlintner@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ianlintner <500914+ianlintner@users.noreply.github.com>

Author: Copilot