Jww vs. fmt: what should one use for printing?

I’m reading the code and can’t understand, when should one use jww and fmt for printing. The most demonstrative case is in commands/hugo.go 780:782 lines:

    jww.FEEDBACK.Println("\nStatic file changes detected")
    const layout = "2006-01-02 15:04 -0700"

Maybe we should unify and standardize this moment?