Run mix format and fix a credo check

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon/actors/member.ex

@@ -8,7 +8,7 @@ defmodule Mobilizon.Actors.Member do
   import Ecto.Changeset
 
   alias Mobilizon.Actors.{Actor, Member, MemberRole}
-  
+
   @type t :: %__MODULE__{
           role: MemberRole.t(),
           parent: Actor.t(),

lib/mobilizon/application.ex

@@ -93,8 +93,7 @@ defmodule Mobilizon.Application do
   def named_version, do: @name <> " " <> @version
 
   def user_agent do
-    info =
-      "#{MobilizonWeb.Endpoint.url()} <#{Config.get([:instance, :email], "")}>"
+    info = "#{MobilizonWeb.Endpoint.url()} <#{Config.get([:instance, :email], "")}>"
 
     named_version() <> "; " <> info
   end