byModule[m.Path] = append(byModule[m.Path], path)
			}
		}
		sep := ""
		for _, m := range mods {
			best := ""
			bestDepth := 1000000000
			for _, path := range byModule[m.Path] {
				d := modload.WhyDepth(path)
				if d > 0 && d < bestDepth {
					best = path
					bestDepth = d
				}
			}
			why := modload.Why(best)
			if why == "" {
				vendoring := ""
				if *whyVendor {