gh-148942: Docs: Clarify that exec() accepts bytes-like objects

Doc/library/functions.rst

@@ -590,7 +590,7 @@ are always available.  They are listed here in alphabetical order.
 
    :param source:
       A Python expression.
-   :type source: :class:`str` | :ref:`code object <code-objects>`
+   :type source: :class:`str` | :term:`bytes-like object` | :ref:`code object <code-objects>`
 
    :param globals:
       The global namespace (default: ``None``).
@@ -633,15 +633,15 @@ are always available.  They are listed here in alphabetical order.
 
    This function can also be used to execute arbitrary code objects (such as
    those created by :func:`compile`).  In this case, pass a code object instead
-   of a string.  If the code object has been compiled with ``'exec'`` as the
-   *mode* argument, :func:`eval`\'s return value will be ``None``.
+   of a string or a bytes-like object.  If the code object has been compiled with
+   ``'exec'`` as the *mode* argument, :func:`eval`\'s return value will be ``None``.
 
    Hints: dynamic execution of statements is supported by the :func:`exec`
    function.  The :func:`globals` and :func:`locals` functions
    return the current global and local dictionary, respectively, which may be
    useful to pass around for use by :func:`eval` or :func:`exec`.
 
-   If the given source is a string, then leading and trailing spaces and tabs
+   If the given source is a string or a bytes-like object, then leading and trailing spaces and tabs
    are stripped.
 
    See :func:`ast.literal_eval` for a function to evaluate strings
@@ -675,7 +675,7 @@ are always available.  They are listed here in alphabetical order.
       untrusted user-supplied input will lead to security vulnerabilities.
 
    This function supports dynamic execution of Python code. *source* must be
-   either a string or a code object.  If it is a string, the string is parsed as
+   a string, a bytes-like object or a code object.  If it is a string or a bytes-like object, it is parsed as
    a suite of Python statements which is then executed (unless a syntax error
    occurs). [#]_ If it is a code object, it is simply executed.  In all cases,
    the code that's executed is expected to be valid as file input (see the