@robrock GitHub has a great service called "Gist" which is for small code snippets. No Git knowledge required, just sign up for an account, paste your code snippets in, and then you get a handy embed code (see screenshot) that you can insert on Wiki pages. It saves all the changes you make to it in a git repository and also lets people for them. I forked your code into a gist of my own and pasted it onto the wiki. Wanna replace it with your own Gist?
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Try hosting your code on GitHub in Gists and embed them on Wiki pages