Trailing Whitespace not Trimmed from couponCode on Discount save

[sbossarte]

Description

If a discount has a coupon code that is entered with trailing whitespace, it can still be added to a cart, but the discount doesn't apply.

Steps to reproduce

1. Create discount with the coupon code ABCD , note the space at the end
2. Attach coupon abcd to the cart
3. Cart says coupon is applied, but not the discount
4. Change coupon code to ABCD
5. Attach coupon abcd to the cart
6. Coupon is applied as well as the discount

Additional info

• Craft version: Craft Pro 3.1.29
• PHP version: 7.2.18
• Database driver & version: MySQL 5.7.19
• Plugins & versions: 2.1.6.1 pro

[lukeholder]

@sbossarte can you confirm in step 5 you meant to type bcd?

[sbossarte]

It was meant to be abcd.