Sometimes basic variable expansion is broken because of number pattern

[jeff-hykin]

(using latest master branch)

rm -f $COMMON_CONFDIR/ifaces/$1

The $1 isn't parsed as a variable. Instead the $ is ignored and the 1 is parsed as a number

(program (command name: (command_name (word)) argument: (word) argument: (concatenation (simple_expansion (variable_name)) (word)) argument: (number)))

Alternatively:

<program>
    <command>
        <command_name>
            <word text="rm" />
        </command_name>
        <whitespace text=" " />
        <word text="-f" />
        <whitespace text=" " />
        <concatenation>
            <simple_expansion>
                <"$" text="$" />
                <variable_name text="COMMON_CONFDIR" />
            </simple_expansion>
            <word text="/ifaces/" />
            <"$" text="$" />
        </concatenation>
        <number text="1" />
    </command>
</program>