Wrong indentation of the last key in a multiline maps on the match side within case statements

[gausby]

Wrong indentation of the last key in a multiline maps on the match side within case statements.

Current:

case statement do
  %{"foo" => "foo",
     "baz" => "baz"} ->
    :ok

  _ ->
    :ok
end

Expected.

case statement do
  %{"foo" => "foo",
    "baz" => "baz"} ->
    :ok

  _ ->
    :ok
end

Notice the extra space before the "baz" key in the current example.

I would mark this issue as low priority, but it is better to report it :)

A pull request with a unit test is coming up

[mattdeboard]

This is also a specific case of #229, since do is a function.