Use `import Enum`?

Code looks cleaner if I `import Enum` on my modules or on my funcs as below.

``` elixir
test "something" do
  import Enum

  numbers = [3,2,1]

  sorted_numbers = numbers |> sort

  assert [1,2,3] == sorted_numbers
end
```

Not sure if I should, considering this is for people learning the language.
