stream: fix __init__ doc

streamable/stream.py

@@ -39,7 +39,7 @@
 class Stream(Iterable[T]):
     def __init__(self, source: Union[Iterable[T], Callable[[], Iterator[T]]]) -> None:
         """
-        Initialize a Stream with a source iterable.
+        Initialize a Stream with a data source.
 
         Args:
             source (Union[Iterable[T], Callable[[], Iterator[T]]]): Either an iterable or a function to be called at iteration time to get a fresh source iterator.