Perry Research contributed a focused documentation improvement to the dotnet/csharpstandard repository, addressing a subtle but impactful issue in the definition of non-nullable reference types. By correcting a misplaced quotation mark in the types.md file, Perry ensured the documentation accurately reflected the intended semantics of the C# language specification. This change, implemented using Markdown and managed through Git workflows, enhanced clarity for developers onboarding to the project and reduced potential confusion around nullable reference types. The work demonstrated attention to detail in technical writing and effective collaboration with maintainers, resulting in a low-risk, traceable update that maintained documentation accuracy and consistency.