fix tests

Author: yordis

lib/mix/tasks/docs.ex

@@ -662,7 +662,8 @@ defmodule Mix.Tasks.Docs do
   end
 
   defp update_output_for_formatter(options, _formatter) do
-    options
+    output = options[:output] || "doc"
+    Keyword.put(options, :output, output)
   end
 
   defp get_docs_opts(config) do

test/mix/tasks/docs_test.exs

@@ -261,8 +261,8 @@ defmodule Mix.Tasks.DocsTest do
               ]}
            ] = run_results
 
-    assert html_options[:output] == "#{tmp_dir}/hello/html"
-    assert epub_options[:output] == "#{tmp_dir}/hello/epub"
+    assert html_options[:output] == "#{tmp_dir}/hello"
+    assert epub_options[:output] == "#{tmp_dir}/hello"
     assert markdown_options[:output] == "#{tmp_dir}/hello/markdown"
   end
 
@@ -305,8 +305,8 @@ defmodule Mix.Tasks.DocsTest do
               ]}
            ] = run_results
 
-    assert html_options[:output] == "#{tmp_dir}/world/html"
-    assert epub_options[:output] == "#{tmp_dir}/world/epub"
+    assert html_options[:output] == "#{tmp_dir}/world"
+    assert epub_options[:output] == "#{tmp_dir}/world"
     assert markdown_options[:output] == "#{tmp_dir}/world/markdown"
   end