/usr/share/doc/m4/examples/forloop.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 | divert(`-1')
# forloop(var, from, to, stmt) - simple version
define(`forloop', `pushdef(`$1', `$2')_forloop($@)popdef(`$1')')
define(`_forloop',
`$4`'ifelse($1, `$3', `', `define(`$1', incr($1))$0($@)')')
divert`'dnl
|