I'm writing a story in plain text using Vim text editor. It doesn't contain big tables, images. However, there will be short listings of source code in several programming languages and syntax highlighting for them is a must. There may be a little amount of formulas. I want to publish it in HTML and PDF.
Is there simple(!) markup language for this? What is better: embed formulas as images or use special markup? I don't want to learn something complex like LaTex.