/usr/share/doc/ruby-rubymail-doc/examples/test/data/transparency/message.4 is in ruby-rubymail-doc 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 | X-Face:
&(.[0qo-5}<J-k`1JP8Y&|HH$0w$Fr6nKupW?<7VOE@w,Yr!)/;L,Y?2KPRXv5AvL>TXSwe
[~Je@%;XWpck*+p#5Qc(>:.x}I$&,g9$dKJZA?n"-{$h\{**<0]C"geE3sz["SDW&!j~oBb4g1!Yk&
Message body.
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