Contributed a targeted documentation update to the vectordotdev/tokio repository, focusing on clarifying the behavior of the Instant.duration_since method when the instant is in the future. The work involved refining the API documentation to correct ambiguous language, specifically addressing a 'that' versus 'this' usage, with the goal of reducing developer confusion and aligning the documentation with actual runtime behavior. No code or runtime changes were introduced, ensuring stability while improving maintainability. The update leveraged Rust and documentation best practices, supporting a smoother onboarding process for new contributors and minimizing potential support questions related to time calculations in asynchronous Rust applications.