Flag '-output-dir' printed both with one and two hyphens

[urban-adeininger]

I'm running this command:

$ hedgerules deploy
error: output-dir is required (set in config file or via --output-dir)

The error text mentions flag --output-dir (two hyphens)

However, the online help prints out --output-dir (one hyphen only)

$ hedgerules deploy -h
Usage of deploy:
  -config string
        path to config file (default "hedgerules.toml")
  -debug-headers
        inject debug headers into viewer-response function
  -dry-run
        parse and validate only, print plan
  -headers-kvs-name string
        CloudFront KVS name for headers
  -max-retries int
        max AWS throttle retries (default 10, 0 disables retries) (default -1)
  -output-dir string
        Hugo build output directory
  -redirects-kvs-name string
        CloudFront KVS name for redirects
  -region string
        AWS region override
  -request-function-name string
        CloudFront Function name for viewer-request
  -response-function-name string
        CloudFront Function name for viewer-response

ToDo: the number of hypens needed should be handled consistently across all execution paths of the program.

The same applies to flag --redirects-kvs-name, maybe other flags are affected, too.