Comment by SonOfLilit

If, like me, you were hoping to find code that is poetry, a few recommendations:

whytheluckystiff, or _why, was a very colorful persona in the early English-speaking Ruby community who wrote some very poetic code (some of it production grade) and inspired a lot of people (me included), and eventually disappeared one day when he was outed. Maybe start with Why's (Poignant) Guide to Programming that is a literary work that is also a Ruby tutorial, available at http://poignant.guide/, and continue by reading archives of his blog (where he posted hand-drawn and sometimes animated poetry in Ruby) and libraries he wrote (I strongly recommend Camping.rb, a 4k minimal MVC framework, that was at once very poetic and production-ready.)

Other than that, if you can read x86 asm I recommend this book of Koans/Poems/whatever you call them, written by someone I know and extremely beautiful: https://www.xorpd.net/pages/xchg_rax/snip_00.html

And in the Perl community there's a long tradition of polyglot perl/English poems: https://docstore.mik.ua/orelly/perl/prog3/ch27_02.htm