8079470: Misleading error message when explicit signature constructor is called with wrong arguments
Reviewed-by: jlaskey, hannesw
escape is function with arity 1
unescape is function with arity 1
This%20is%20great%21
What%20is%20going%20on%20here%3F%3F
%uFFFF%uFFFE%u1FFF
This is great!
What is going on here??