/usr/lib/dvi2ps/tumble.ps is in dvi2ps 5.1j-1.2build1.
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 | %%BeginSetup
statusdict begin mark
{ <</Duplex true>> setpagedevice
<</Tumble true>> setpagedevice } stopped
cleartomark end
%%EndSetup
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