Hey go-nuts,
I realize than running `mybinary --help` returns a nice help message along
with a exit status 2.
What is the reason it doesn't return 0?
I fixed it by manually adding a help flag:
```
var help = flag.Bool("help", false, "Print the help message")
[...]
if *help {
flag.PrintDefaults()
return
}
```
But I'm still confused why the default behavior is returning an error along
with the right message.
Cheers,
Philmod
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