JDK 16 RFR of JDK-5017980: Allow signed positive integer to be parsed instead of a NumerFormatException

[Brian Burkhalter]

Hi Joe,

CSR reviewed; patch looks fine.

Brian

> On Aug 5, 2020, at 11:47 PM, Joe Darcy <joe.darcy at oracle.com> wrote:
> 
> -     * BigInteger.  The String representation consists of an optional minus
> +     * BigInteger.  The String representation consists of an optional minus or plus