Refactor conn aliasing in controller tests to use pipe chains

Applied refactor_conn_aliasing.sh to eliminate conn shadowing.

Show draft posts in test and dev

app/test/firehose_web/controllers/page_controller_test.exs

@@ -2,8 +2,7 @@ defmodule FirehoseWeb.PageControllerTest do
   use FirehoseWeb.ConnCase
 
   test "GET /", %{conn: conn} do
-    conn = get(conn, ~p"/")
-    body = html_response(conn, 200)
+    body = conn |> get(~p"/") |> html_response(200)
     assert body =~ "Drinking from the firehose"
     assert body =~ "Willem van den Ende"
   end