use macros for true and false

index.bs

@@ -4122,10 +4122,10 @@ To validate the calling origin is an authorized related origin for a given cerem
     1. Remove any [=public suffix=] from the end of |domain|, including private registries and unknown registries. If |domain| is now empty, [=continue=].
     1. Split |domain| into [=origin labels|labels=] and let |label| be the right-most one.
     1. If |labelsSeen| [=set/contains=] |label|, [=continue=].
-    1. If |rpIdRequested| and |url| are [=same origin=], return `true`.
+    1. If |rpIdRequested| and |url| are [=same origin=], return [TRUE].
     1. [=set/Append=] |label| to |labelsSeen|.
     1. If the [=set/size=] of |labelsSeen| is greater than or equal to |maxLabels|, [=break=].
-1. Return `false`.
+1. Return [FALSE].
 
 # WebAuthn <dfn>Authenticator Model</dfn> # {#sctn-authenticator-model}