Stop wrapping ExUnit

lib/blanks.ex

@@ -20,4 +20,20 @@ defmodule Blanks do
   defp count(:___, acc), do: {node, acc+1}
   defp count({:___, _, _}, acc), do: {node, acc+1}
   defp count(node, acc), do: {node, acc}
+
+  def replace_line([do: ast], replacement_fn), do: [do: replace_line(ast, replacement_fn)]
+  def replace_line({:__block__, meta, lines}, replacement_fn) do
+    replaced_lines = Enum.map(lines, fn(line) ->
+      replace_line(line, replacement_fn)
+    end)
+
+    {:__block__, meta, replaced_lines}
+  end
+  def replace_line(line, replacement_fn) do
+    if Blanks.count(line) > 0 do
+      replacement_fn.(line)
+    else
+      line
+    end
+  end
 end