   @doc """
   Receives a list of tuples and returns `true` if there is
   a tuple where the item at `position` in the tuple matches
-  the given `item`.
+  the given `key`.
 
   ## Examples
 

  @doc """
  Receives a list of tuples and returns the first tuple
  where the item at `position` in the tuple matches the
  given `item`.

  ## Examples


  @doc """
  Receives a list of tuples and deletes the first tuple
  where the item at `position` matches the
  given `key`. Returns the new list.

  ## Examples

