Discount display in confirmation emails and PayPal

Hi,
If I specify a discount coupon code as 10% the email confirmation displays: -10 Percent.

If I specify a discount coupon code as $5.00 the email confirmation displays -$5.00

It appears the $ is encoded but not reversed when creating email notices. This also displays the encoded $ in PayPal Express Checkout.

How and where to fix?

Thanks in advance for your guidance.
Merv (lzw8bk)

PS: I searched in support but found no instances of this issue.