fix formatting

docs/source/introduction.rst

@@ -40,10 +40,10 @@ Design
 The design of the stripe-checkout service is roughly as following:
 
 Whenever a visitor registers for TNC, they fill out a form in Visit. This form sets their
-  ``registrationType``. While filling out the form, the visitor may also want to purchase some extras,
-  such as access to side meetings or social events. The information for extras is stored in the
-  visitors profile as answers to certain questions. For example, there is a question for "Side
-  meetings" with answers "Friday" and "Sunday"
+``registrationType``. While filling out the form, the visitor may also want to purchase some extras,
+such as access to side meetings or social events. The information for extras is stored in the
+visitors profile as answers to certain questions. For example, there is a question for "Side
+meetings" with answers "Friday" and "Sunday"
 
 * As the final page in the registration form, the visitor is redirected to the stripe checkout
   service. Here they see what they've checked out and how much they need to pay.