GitLab

commands: Made Command run functions return (interface{}, error) instead of setting the values in the response

commands/http: Don't set Content-Type for stream outputs so browsers can MIME-sniff the actual content type

commands: Ensure argument parsing maintains total argument count, so that argument validation will fail if there are too many

should be able to look at a function in isolation and prove it won't
panic. if that's not possible, should cast safely.