extra ';' is added just before '#' when value including '#' is set in RHS with mvel dialect

Issue

; is added in the value incorrectly when string containing # is set to fact more than one time with mvel dialect.
For example, when run the following rule,

dialect "mvel"

rule "testRule"

    when
        $fact : Fact();
    then
        $fact.name = "A#";
        $fact.value = "B#";
        System.out.println( $fact );

end

Incorrect string "B;#" (i.e. ; is added before #) is set to value instead of "B#".