>> Simply removing \fill-line will shift the line to the left margin, >> leaving the length the same. > > To my eye that looks a lot better.
It's really a matter of style. For example, https://tex.stackexchange.com/questions/214644/how-to-add-a-footnote-separator-rule shows a footnote rule exactly as formatted by LilyPond (see attached image) – this is for the scientific magazine 'IEEE transactions'. Werner
