Wrap null causes huge indent (using ASCII)

[OsmanAltun]

Code:

yargs.usage(
  fs.readFileSync(path.join(__dirname, 'ascii-logo.txt'), 'utf8')
  .split('\n')
  .map(line => chalk`{bold ${line.substring(0, 20)}}{cyan ${line.substring(20)}}`)
  .join('\n')
  .concat('\nsdsad')
)
  .wrap(null)
  .parse();
yargs.showHelp();

result:

                                          .__                               .__       .___
                       ____   ____   ____ |  |   ____   __  _  _____________|  |    __| _/
                     _/ __ \_/ __ \_/ __ \|  |  /  _ \  \ \/ \/ /  _ \_  __ \  |   / __ | 
                     \  ___/\  ___/\  ___/|  |_(  <_> )  \     (  <_> )  | \/  |__/ /_/ | 
                      \___  >\___  >\___  >____/\____/    \/\_/ \____/|__|  |____/\____ | 
                          \/     \/     \/                                             \/ 
                     sdsad

Options:
  --help     Show help  [boolean]
  --version  Show version number  [boolean]

expected:

                     .__                               .__       .___
  ____   ____   ____ |  |   ____   __  _  _____________|  |    __| _/
_/ __ \_/ __ \_/ __ \|  |  /  _ \  \ \/ \/ /  _ \_  __ \  |   / __ | 
\  ___/\  ___/\  ___/|  |_(  <_> )  \     (  <_> )  | \/  |__/ /_/ | 
 \___  >\___  >\___  >____/\____/    \/\_/ \____/|__|  |____/\____ | 
     \/     \/     \/                                             \/ 
sdsad

Options:
  --help     Show help  [boolean]
  --version  Show version number  [boolean]

possible cause?
After some testing I saw that the leading whitespaces in the first line causes this effect.
It might have something to do with cliui lib, because changing the notation of ui.div('string') to ui.div({text: 'string'}) seems to fix this issue. I will open a PR with this change.