/usr/share/doc/ruby-rubymail/guide/MIME.txt is in ruby-rubymail 1.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | = MIME Support in RubyMail
FIXME: write this.
TODO: show how to add, delete, decode and encode parts.
http://rwiki.moonwolf.com/rw-cgi.cgi?cmd=view;name=RubyMail
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