Andrew improved the documentation user experience for the prettier/angular-html-parser repository by implementing a cohesive tutorial button styling system. He introduced primary color variables and consistent button styles using CSS, ensuring alignment with the existing design system and enhancing accessibility for users navigating the documentation. The work focused on front end development and documentation, leveraging CSS and Markdown to deliver visually unified and accessible tutorial buttons. Andrew followed docs-infra conventions throughout the process, delivering the changes in a single, localized commit. No regressions were introduced, and the update was limited to documentation styling, reflecting a focused and well-contained engineering effort.