add an explanatory comment to AccountInteractions

app/models/concerns/account_interactions.rb

@@ -76,6 +76,7 @@ module AccountInteractions
 
   def mute!(other_account, notifications: true)
     mute = mute_relationships.create_with(hide_notifications: notifications).find_or_create_by!(target_account: other_account)
+    # When toggling a mute between hiding and allowing notifications, the mute will already exist, so the find_or_create_by! call will return the existing Mute without updating the hide_notifications attribute. Therefore, we check that hide_notifications? is what we want and set it if it isn't.
     if mute.hide_notifications? != notifications
       mute.hide_notifications = notifications
       mute.save!