[Bug 1525954] Re: mailman-2.1.20: option "subject_prefix": prefix trailing blanks are removed when subject lines have non-ASCII characters

[Mark Sapiro]

The issue is with RFC 2047 encoded Subject: and the fact that white
space is insignificant between RFC 2047 "encoded words".

This fix adds a trailing space to the subject_prefix (from which it has
been previously stripped) under what I think is just those circumstances
where it is needed.

There is another issue in that under some circumstances, the prefix will
be followed by two spaces. This is unchanged by this fix and I have no
plan to try to change it. I think this only occurs when the prefix is
ascii only and the incoming Subject: already contains the prefix, but
doesn't contain a Re: indicator.

** Changed in: mailman
   Importance: Undecided => Low

** Changed in: mailman
       Status: New => Fix Committed

** Changed in: mailman
    Milestone: None => 2.1.21

** Changed in: mailman
     Assignee: (unassigned) => Mark Sapiro (msapiro)

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Title:
  mailman-2.1.20: option "subject_prefix": prefix trailing blanks are
  removed when subject lines have non-ASCII characters

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