update blog post, and run credo with 'pi'

app/lib/firehose_web/controllers/blog_controller.ex

@@ -58,6 +58,7 @@ defmodule FirehoseWeb.BlogController do
   end
 
   defp parse_page(nil), do: 1
+
   defp parse_page(str) do
     case Integer.parse(str) do
       {page, ""} when page > 0 -> page