Racket Library for Elegant HTML5 Generation

The `html-printer` library for Racket provides an elegant way to generate well-formatted HTML5 code. Its core function, `xexpr->html5`, converts X-expressions to HTML5 strings with automatic indentation and line wrapping, allowing customization of column width. It's Unicode-aware, correctly handling character lengths, and optionally adds line breaks between tags for improved readability and maintainability. Ideal for creating semantically clean and structurally sound HTML5.