FlagErrorFunc is a function to be passed to (*cobra.Command).SetFlagErrorFunc that establishes GNU-ish behavior for invalid flag usage.

GetTerminalWidth returns the width of the terminal that you should wrap text to.

OnlySubcommands is a cobra.PositionalArgs that is similar to cobra.NoArgs, but prints a better error message.

RunSubCommands is for use as a cobra.Command.RunE for commands that don't do anything themselves but have subcommands.

Wrap the string `s` to a maximum width `w`.

Wrap the string `s` to a maximum width `w` with leading indent `i`.