Some errors automatically outputting content to stderr, while some others aren't

[Arteneko]

I encountered a problem: Some errors, like Usage, are directly outputting data on the standard output when some others, like "Please specify the [...] command" aren't.

Could the list of auto-outputting errors be documented, or could a standard behaviour be decided?

[atc0005]

Potentially related:

Configure the options struct to have a short name longer than 1 character (e.g., rm as short for remove). This failed silently for me (I'm new to Go, so this threw me for a loop).

[oubiwann]

I've addressed this in an error-wrapping lib for go-flags, here:

• https://github.com/geomyidia/flagswrap

At least until go-flags gets more maintenance and gets an error-handling update ...