Address review comments (signature, docstrings).

Author: serhiy-storchaka

Doc/library/base64.rst

@@ -51,7 +51,7 @@ The :rfc:`4648` encodings are suitable for encoding binary data so that it can b
 safely sent by email, used as parts of URLs, or included as part of an HTTP
 POST request.
 
-.. function:: b64encode(s, altchars=None)
+.. function:: b64encode(s, altchars=None, *, wrapcol=0)
 
    Encode the :term:`bytes-like object` *s* using Base64 and return the encoded
    :class:`bytes`.

Lib/base64.py

@@ -53,7 +53,8 @@ def b64encode(s, altchars=None, *, wrapcol=0):
     application to e.g. generate url or filesystem safe Base64 strings.
 
     If wrapcol is non-zero, the output will be represented in lines of
-    no more than wrapcol characters each, separated by a newline character.
+    no more than wrapcol characters each, separated by a newline (b'\\n')
+    character.
     """
     encoded = binascii.b2a_base64(s, wrapcol=wrapcol, newline=False)
     if altchars is not None:
@@ -331,7 +332,8 @@ def a85encode(b, *, foldspaces=False, wrapcol=0, pad=False, adobe=False):
     feature is not supported by the "standard" Adobe encoding.
 
     If wrapcol is non-zero, the output will be represented in lines of
-    no more than wrapcol characters each, separated by a newline character.
+    no more than wrapcol characters each, separated by a newline (b'\\n')
+    character.
 
     pad controls whether the input is padded to a multiple of 4 before
     encoding. Note that the btoa implementation always pads.