Ex_docs some examples not showing

Hi

I’ve recently faced a problem with doc tests on html documents:

Here is my code and docs:

@doc """
Does something good!

## Examples
iex> Module.do_something
{:ok, 123}

iex> Module.do_something
:error
"""
def do_something() do
  ...
end

In the documents the output will be like:

Examples

iex> Module.do_something
iex> Module.do_something :error

As you can see the tuple in the first example is missing in the docs. Am i doing something wrong?