I'm curious — is it not normal to add in-line explanatory comments in the Rails codebase? I'm thinking if I were writing this code in an application, and it lo

I'm curious — is it not normal to add in-line explanatory comments in the Rails codebase? I'm thinking if I were writing this code in an application, and it looked this cryptic, I might at least add a comment noting what it was for. Not that people shouldn't look in git. But inline is easier to notice, no?