   @compile :inline_list_funcs
 
   @doc """
-  Given a list of lists, concatenates the sublists into a single list.
+  Given a list of lists, concatenate the sublists into a single list.
 
   ## Examples
 


      iex> List.insert_at([1, 2, 3], -1, 0)
      [1, 2, 3, 0]

  """
  def insert_at(list, index, value) do


  @doc """
  Receives a list of tuples and replaces the item
  identified by `key` at `position`. If the item
  does not exist, it is added to the end of the list.

  ## Examples
