I'm on develop branch on commit 3991d65ea5b4c91b39f130ceadac7e413233ada6
I tried installing sample data using the Magento CLI from the documentation and this is the result
[root@f6d354ebfaa4 magento2]# ./bin/magento sampledata:deploy magento/module-bundle-sample-data
[RuntimeException]
Too many arguments.
sampledata:deploy