Fervor of Battle Mastery Keystone

Fervor of Battle Mastery Patch notes text: "STACKING: Hitting champions with basic attacks and abilities generates a Fervor stack (2 for melee attacks, 2 second cooldown for abilities). This is unchanged."

But in the client, the actual text is: "Hitting champions with basic attacks generate a Fervor stack (2 for melee attacks). Stacks of Fervor last 4 seconds (max 10 stacks) and increase your AD by 1-6 for each stack."

So the in-client text left out that abilities grant a stack of Fervor. I also tested it in game and single target abilities DO NOT grant a stack of Fervor either. So was this intended or Riot need to fix?