[3.15] gh-67512: Document IMAP4.append() flags argument (GH-149907) (GH-153078)

(cherry picked from commit 5f8d9d35753e22946880d4fefb123e8234706266)

Co-authored-by: Savage Mechanic <savagemechanic@github.com>

diff --git a/Doc/library/imaplib.rst b/Doc/library/imaplib.rst
index 8732aa15d2f1be51c0112f22508a2e5fb0ddac10..38a749b95f3e0e90f0f3d34225c0c6d74db2be60 100644 (file)
--- a/Doc/library/imaplib.rst
+++ b/Doc/library/imaplib.rst
@@ -209,6 +209,11 @@ An :class:`IMAP4` instance has the following methods:
 
    Append *message* to named mailbox.
 
+   *flags* may be ``None`` or a string of IMAP flag tokens.  Multiple
+   flags are separated by spaces, for example ``r'\Seen \Answered'``.
+   If *flags* is not already enclosed in parentheses, parentheses are
+   added automatically.
+
 
 .. method:: IMAP4.authenticate(mechanism, authobject)