>>>>> On Sun, 14 Apr 2019 09:32:32 +0000, Christophe TROESTLER <Christophe.TROESTLER@umons.ac.be> said:

    Christophe> Ical invitations sent by Google use a content type
    Christophe> such as

    Christophe>   Content-Type: text/calendar; charset="UTF-8";
    Christophe> method=REQUEST

    Christophe> The problem is that the charset is not properly
    Christophe> understood by gnus-icalendar because it is
    Christophe> capitalized.  The following “downcase” in the
    Christophe> definition of “gnus-icalendar-with-decoded-handle”
    Christophe> fixes the problem:

Looks obviously correct. Eli, can I put this in emacs-26?