Difference between append_if_no_line and append_if_no_line

output

cmdln@ThinkPad-W520:~/.cfagent/inputs$ cf-agent -KIf ./test_append_lines.cf 
 -> Created file /tmp/test1, mode = 600
 -> Edited file /tmp/test1
 -> Created file /tmp/test2, mode = 600
 -> Edited file /tmp/test2
 -> Edited file /tmp/test2
 -> Edited file /tmp/test2
cmdln@ThinkPad-W520:~/.cfagent/inputs$ cat /tmp/test1
L1i1
L1i2
L1i3
cmdln@ThinkPad-W520:~/.cfagent/inputs$ cat /tmp/test2
L1i1
L1i2
L1i3

test_append_lines.cf

body common control {

    bundlesequence  => {
                        "main",
                        };

    inputs          => {
                        "cfengine_stdlib.cf",
                        };
}

bundle agent main {

    vars:
        "list1" slist => { "L1i1", "L1i2", "L1i3" };
        "list2" slist => { "L2i1", "L2i2", "L2i3" };

    files:
        "/tmp/test1"
            create => "true",
            edit_line => append_if_no_lines("@(main.list1)");

        "/tmp/test2"
            create => "true",
            edit_line => append_if_no_line("$(list1)");

}