Describe the bug:
Splash & lingering potion along with tipped arrows are missing their lang file entry so everyone sees the whole "item.minecraft.."

To Reproduce:

1. Hover over said items in jei.

Ayoo:
here you go, can't do the other languages as I'm a derp but just toss these in
"item.minecraft.splash_potion.effect.serendipity": "Splash Potion of Serendipity", "item.minecraft.tipped_arrow.effect.serendipity": "Arrow of Serendipity", "item.minecraft.lingering_potion.effect.serendipity": "Lingering Potion of Serendipity",