What client library to take for syntax highlighting to be modern and fashionable?

Question

Syntax highlighting

I am making a site that will have a lot of source code inserts in the articles.
Recommend a library for syntax highlighting so that it is stylish and fashionable. with line numbers.
I looked at ready-made solutions, there are a lot of them, help with the choice.

Answer 1

Github used it for gist
https://ace.c9.io/#nav=about