Commented out final 'main' function in order to fit within pattern of…

[buntine]

… other examples and prevent incorrect indentation

[rust-highfive]

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[steveklabnik]

I believe you should be able to remove it entirely; can you give that a try?

[buntine]

Ok, done! It's rendering correctly on my fork: https://github.com/buntine/rust/blob/master/src/doc/book/closures.md

[steveklabnik]

@bors: r+ rollup

thanks!

[bors]

📌 Commit 8483732 has been approved by steveklabnik