- fmt.Fprintf(os.Stderr, "%s\n\n", usageStr)
- fmt.Fprintf(os.Stderr, "Usage:\n%s [OPTIONS] <input-file.csv>\n\n", os.Args[0])
- fmt.Fprintf(os.Stderr, "Options:\n")
+ fmt.Fprintf(flags.Output(), "%s\n\n", usageStr)
+ fmt.Fprintf(flags.Output(), "Usage:\n%s [OPTIONS] <input-file.csv>\n\n", os.Args[0])
+ fmt.Fprintf(flags.Output(), "Options:\n")