Fix bad rendering

Closes #650

Author: penelopeysm

core-functionality/index.qmd

@@ -52,6 +52,7 @@ These respectively correspond to likelihood and prior terms.
 
 It is easier to start by explaining when a variable is treated as an observed value.
 This can happen in one of two ways:
+
 - The variable is passed as one of the arguments to the model function; or
 - The value of the variable in the model is explicitly conditioned or fixed.