Worked on improving API documentation accuracy in the pytorch/pytorch repository, focusing on the torch.trapz and torch.trapezoid functions. Updated the torch.trapz docstring to clarify that the x parameter is optional, aligning the documentation with both the actual implementation and its trapezoid alias. This change aimed to reduce user confusion and ensure consistent parameter semantics across related APIs. The work involved Python and documentation skills, with collaboration across teams and adherence to the standard open-source review process. No functional code changes were made, but the update enhanced onboarding and clarified expectations for users integrating these functions into machine learning workflows.