   end
 
   @doc """
-  Gets the IEx width for printing.
+  Returns the IEx width for printing.
 
   Used by helpers and it has a default maximum cap of 80 chars.
   """
+  @spec width() :: pos_integer()
   def width do
     IEx.Config.width()
   end
 
   @doc """
-  Gets the options used for inspecting.
-  """
+  Returns the options used for inspecting.
+  """
+  @spec inspect_opts() :: keyword()
   def inspect_opts do
     IEx.Config.inspect_opts()
   end

    * `%node`    - the name of the local node

  """
  def configure(options) do
    IEx.Config.configure(options)
  end

  @doc """
  Returns registered `after_spawn` callbacks.
  """
  @spec after_spawn() :: [fun()]
  def after_spawn do
    IEx.Config.after_spawn()
  end

  @doc """
  Returns `true` if IEx was started, `false` otherwise.
  """
  @spec started?() :: boolean()
  def started? do
    IEx.Config.started?()
  end
