From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Miele <sebastian.miele@gmail.com>
Subject: Non-printable Characters in Bug Reports
Date: Sat, 21 Sep 2019 14:17:05 +0000
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To: emacs-orgmode@gnu.org

My last bug report on this list was prepared with org-submit-bug-report
in an Emacs with a minimal configuration. From there I copy/pasted the
contents of the resulting mail buffer to an mu4e mail buffer in my fully
configured usual Emacs. Then I finished the bug report and hit send.

mu4e noticed non-printable characters in the mail and asked what to do
about it. The mail contained e.g. something like

  ("ftp" :follow
     #[257 "\301\300\302^CQ!\207" ["ftp" browse-url ":"] 5
     "\n\n(fn URL)"])

where ^C was not ^ followed by C, but the way Emacs dispays some
particular non-printing character.

I told mu4e to replace the characters. Apparently, all non-printable
characters have been replaced by ASCII periods.

Is there a best practice? Leave or replace?