chore: apply mix format to blogex test files and router

blogex/test/support/fake_blog.ex

@@ -35,7 +35,9 @@ defmodule Blogex.Test.FakeBlog do
     }
 
     case Agent.start(fn -> state end, name: __MODULE__) do
-      {:ok, pid} -> {:ok, pid}
+      {:ok, pid} ->
+        {:ok, pid}
+
       {:error, {:already_started, pid}} ->
         Agent.update(__MODULE__, fn _ -> state end)
         {:ok, pid}