/usr/share/doc/dpatch/examples/rules/rules.dh7 is in dpatch 2.0.38.
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 | #! /usr/bin/make -f
##
## Sample dpatch rules file, to be used with debhelper >= 7, and
## dpatch >= 2.0.32.
%:
dh $@ --with dpatch
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