Digest generation

Hello! Previously I asked a question I answered myself, but looking through the Subscribe2 files I’ve been unable to locate the loops that generate the digest emails. I’m looking for them so that I can add inline styles to the titles, links, and such that will automatically replicate through the loop. Can anyone help me solve this? I only send out digests, but without knowing where the loops sit and when they echo it’s quite a bit of (fabulous!) code to go through. Thanks!

https://www.ads-software.com/extend/plugins/subscribe2/