revert: nest only markdown files

Author: yordis

lib/mix/tasks/docs.ex

@@ -656,10 +656,13 @@ defmodule Mix.Tasks.Docs do
     Keyword.put(options, :formatters, formatters)
   end
 
-  defp update_output_for_formatter(options, formatter) do
+  defp update_output_for_formatter(options, "markdown") do
     output = options[:output] || "doc"
-    formatter_output = Path.join(output, formatter)
-    Keyword.put(options, :output, formatter_output)
+    Keyword.put(options, :output, Path.join(output, "markdown"))
+  end
+
+  defp update_output_for_formatter(options, _formatter) do
+    options
   end
 
   defp get_docs_opts(config) do