Binary package “elpa-htmlize” in ubuntu bionic

convert buffer text and decorations to HTML

 This package converts the buffer text and the associated decorations
 to HTML. It supports three types of HTML output, selected by setting
 htmlize-output-type: css, inline-css (optimized for code snippets),
 and font (simpler output, doesn't rely on CSS). You can also use
 htmlize from your Emacs Lisp code.