editorial fixup, thanks @bzbarsky, fixes #275

index.bs

@@ -368,7 +368,8 @@ This method takes the following parameters:
     created. This is meant for later use by the authenticator when it needs to prompt the user to select a credential. An
     authenticator is only required to store one credential for any given value of {{accountInformation}}. Specifically, if an
     authenticator already has a credential for the specified value of {{Account/id}} in {{accountInformation}}, and if this
-    credential is not listed in {{ScopedCredentialOptions/excludeList}}, then after successful execution of this method:
+    credential is not listed in the {{ScopedCredentialOptions/excludeList}} member of {{options}}, then after successful
+    execution of this method:
     - Any calls to {{getAssertion()}} that do not specify {{AssertionOptions/allowList}} will not result in the older
         credential being offered to the user.
     - Any calls to {{getAssertion()}} that specify the older credential in the {{AssertionOptions/allowList}} may also not