Example-macros.md

@@ -3,4 +3,5 @@ Links to some example macros. If you've written a cool macro and want to share p
 * [haskell style do-notation](https://gist.github.com/3831514)
 * [fragment of scheme](https://gist.github.com/3854258)
 * [var destructuring](https://gist.github.com/3881008)
-* [parameter annotations](https://gist.github.com/3902112)
+* [parameter annotations](https://gist.github.com/3902112)
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+* [coffeescript's `do` syntax](https://gist.github.com/4013740)
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