William Black enhanced the facebook/docusaurus repository by improving the accuracy of SQL block comment highlighting within code samples used in documentation and developer guides. He focused on refining the code block magic comment system, ensuring that SQL snippets render more reliably and with correct syntax highlighting. Using TypeScript and front end development skills, William implemented changes in the theme-common package to support these enhancements. His work addressed a specific gap in documentation quality, making SQL code examples clearer and more maintainable for users. The depth of the contribution reflects targeted feature development rather than broad architectural changes or bug fixes.