This is a empty version of Raven Filter: Leila. That means there are no spells added exapt an example spell.
Raven Filter will add a 'Spell list' dropdown menu to the Buff and Debuff tab of Raven Bar Groups.
Add Spells by yourself!
Just open the .lua file with a Text Editor:
Add spells by name: 12345, 23456, 34567
Add spells by exact spell id: "#12345", "#23456", "#34567",
Use the group you have made:
/raven ▶ Bar Groups ▶ Buffs/Debuffs ▶ Use Spell List
You can use idTip or wowhead URLs like wowhead URLs to find out Spell IDs.