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Re:Highlight.js – Syntax highlighting for the Web by lelandbatey on Friday February 20, 2015 @03:21PM (#9082744)
Many popular syntax highlighting libraries do include this functionality. For example, the popular Python syntax highlighter "Pygments" supports line numbers[0].

[0] - http://pygments.org/docs/formatters/#HtmlFormatter

Re:Highlight.js – Syntax highlighting for the Web by pelhage on Friday February 20, 2015 @03:28PM (#9082794)
I personally use Prism.js for my blogging, which is what Smashing Magazine and CSS-tricks uses. Prism includes line numbers.

I like Prism so far and don't have any issues with it yet