Diff two versions of a given file
Compare two versions of a given file with diff utility.
vcli file diff <file-id> <version1> <version2> [flags]
  -h, --help   help for diff
  -c, --config string   configuration file for the CLI (default ~/.vcli.yml)
                        Could also be set via VARNISH_CONTROLLER_CLI_CONFIG=/path/to/config.yml
      --csv             Output the response table as CSV format.
  -j, --json            Output the response table as JSON format.