/usr/share/doc/pmw/examples/ex53 is in pmw-doc 1:4.27-1.
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 | nocheck
notime
unfinished
[stave 1 treble 1]
d'\../b\ e'\../(\ e'\../)\ g\-/B\ |
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