some typo/styling fixes in docs

docs/source/introduction.rst

@@ -15,15 +15,14 @@ features:
   * Use a specific invoice template
 
 These features are not supported by Visit's implementation of the Stripe integration. This
-service acts as an in-between layer and does support these features
+service acts as an in-between layer and does support these features.
 
 When visitors are registering to TNC2025 in Visit cloud, they are redirected to this service in the
 final step of the registration form. Here they get the opportunity to fill out a purchase order
 and/or VAT number. Upon clicking a confirmation button an invoice is created for them and they are
 redirected to Stripe where they can view the invoice, pay directly by credit card and/or see
 payment instructions for paying by bank transfer. They also receive an e-mail with all payment
-information
-``
+information.
 
 
 .. note::