Upon further thought, the text that I cited in RFC 2369 ("MTAs MUST NOT insert
whitespace within the brackets [contained in list header fields]") might not
apply to mail user agents, and particularly not to the software library that I
referred to in a previous message, which is primarily for mail user agents, not
MTAs.
As a result, I declare my question moot.
--Peter
From: Peter Occil
Sent: Thursday, July 19, 2018 7:24 AM
To: iesg(_at_)ietf(_dot_)org
Subject: Question regarding RFC 2369
RFC 2369 sec. 2 currently says:
MTAs MUST NOT insert whitespace within the brackets [contained
in list header fields], but client applications should treat any
whitespace, that might be inserted by poorly behaved MTAs,
as characters to ignore.
[…]
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