ansi, ansi-styles and colorize aren't defined in the web version

[decadent]

The three functions ansi, ansi-styles and colorize are mentioned and used in the code for Pegthing in the Functional Programming chapter (# 5) but aren't defined in the text—though they are there in the pegthing repo code.

It's a minor issue, of course—and thank you for the book!

[decadent]

The same with characters-as-strings.

[vakimov]

#145

[tjscollins]

They're not in the pdf ebook either.