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I don't know who needs to hear this, but this works in #ElixirLang (new line after :foo is key): if true, do: (:foo :bar) Can you guess what it returns?

`:bar` as what you have inside parens is a code block. It is the same as if true do :foo :bar end Just written in a funky way.

That is not 100% correct. `()` and `(1; 2)` (`;` can be replaced by newline there) is equivalent to "meta node" in AST called `__block__` (which is documented in `Kernel.SpecialForms` - hexdocs.pm/elixir/Kerne...).