Function defaultUsage

flag.go:790–793

defaultUsage is the default function to print a usage message.

(f *FlagSet)

// defaultUsage is the default function to print a usage message.
func defaultUsage(f *FlagSet) {
	fmt.Fprintf(f.Output(), "Usage of %s:\n", f.name)
	f.PrintDefaults()
}

// NOTE: Usage is not just defaultUsage(CommandLine)
// because it serves (via godoc flag Usage) as the example