service/donate.md

@@ -31,7 +31,7 @@ and deploys a staging version at
 <https://staging.donate-review.torproject.net/.
 
 It's possible to fill in the donation form on this page, and use [Stripe test
-credit card numbers] for the payment information. When a donation is
+credit card numbers][] for the payment information. When a donation is
 submitted on this form, it should be processed by the PHP middleware and
 inserted into the [staging CiviCRM instance](https://staging.crm.torproject.org/). It should also be visible
 in the "test" Stripe interface.