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#!/usr/bin/perl -w ... print " < $a > < $b > < $c > \n"; }
#> ./test-subroutine.pl Passing in $a: 1, $b: 1, $c: 1: expect p 1 1 ... Passing in $a: 3, $b: 3, $c: 3: expect 3 w 3 < 3 > < w > < 3 > #>