Document mix tasks

lib/mix/tasks/make_moderator.ex

 defmodule Mix.Tasks.SetModerator do
+  @moduledoc """
+  Set moderator to a local user
+
+  Usage: ``mix set_moderator <username>``
+
+  Example: ``mix set_moderator lain``
+  """
+
   use Mix.Task
   import Mix.Ecto
   alias Pleroma.{Repo, User}
 
-  @shortdoc "Set moderator status"
   def run([nickname | rest]) do
     Application.ensure_all_started(:pleroma)
 

lib/mix/tasks/register_user.ex

 defmodule Mix.Tasks.RegisterUser do
+  @moduledoc """
+  Manually register a local user
+
+  Usage: ``mix register_user <name> <nickname> <email> <bio> <password>``
+
+  Example: ``mix register_user 仮面の告白 lain lain@example.org "blushy-crushy fediverse idol + pleroma dev" pleaseDontHeckLain``
+  """
+
   use Mix.Task
   alias Pleroma.{Repo, User}
 

lib/mix/tasks/set_locked.ex

 defmodule Mix.Tasks.SetLocked do
+  @moduledoc """
+  Lock a local user
+
+  The local user will then have to manually accept/reject followers. This can also be done by the user into their settings.
+
+  Usage: ``mix set_locked <username>``
+
+  Example: ``mix set_locked lain``
+  """
+
   use Mix.Task
   import Mix.Ecto
   alias Pleroma.{Repo, User}
 
-  @shortdoc "Set locked status"
   def run([nickname | rest]) do
     ensure_started(Repo, [])