Marc contributed to the unicode-org/icu repository by improving the reliability of its documentation, specifically focusing on the Hjson configuration guide. He identified and fixed a broken external link in buildtool.md, updating it to point to the correct Hjson GitHub repository. This targeted change, implemented using Markdown and documentation best practices, ensured that users could access accurate configuration information, thereby reducing confusion and potential support requests. Marc’s disciplined approach involved a single, low-risk commit that aligned ICU documentation with the appropriate external resource. His work demonstrated attention to detail and a focus on maintaining high-quality, user-friendly technical documentation.