[L8D]

Where Ruby usually denotes code blocks with a `do` and an `end`, Python denotes code blocks with a `:` and an outdent. But also, Ruby has a lot more implicit syntax and uses methods as operators(`1 + 1 == 1.+(1)`). There are a few more things that wouldn’t be obvious, like how it is still indentation sensitive yet you still need to use an `end`. Also, you can avoid the `end` keyword is you include it on the same line, like so:

    fun square(n): n * n