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#! /usr/bin/awk -f

! /^\#/ && ! /^$/ {
    xs[$1]++
}
    
END {
    for (x in xs) {
        printf("%s%s", sep, x, sep = " ")
    }
}
Commit	Line	Data
d928c03b SK	1	#! /usr/bin/awk -f
	2
	3	! /^\#/ && ! /^$/ {
	4	xs[$1]++
	5	}
	6
	7	END {
	8	for (x in xs) {
	9	printf("%s%s", sep, x, sep = " ")
	10	}
	11	}