Update docs/world api.md

Co-authored-by: Exempt-Medic <60412657+Exempt-Medic@users.noreply.github.com>

docs/world api.md

@@ -306,6 +306,7 @@ An access rule is a function that returns `True` or `False` for a `Location` or
 The two possible ways to make a CollectionRule are:
 - `def rule(state: CollectionState) -> bool:`
 - `lambda state: ... boolean expression ...`
+
 An access rule can be assigned through `set_rule(location, rule)`.
 
 Access rules usually check for one of two things.