/usr/share/doc/m4/examples/curry.m4 is in m4 1.4.18-1.
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 7 | divert(`-1')
# curry(macro, args)
# Expand to a macro call that takes one argument, then invoke
# macro(args, extra).
define(`curry', `$1(shift($@,)_$0')
define(`_curry', ``$1')')
divert`'dnl
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