[SSSD] [sssd PR#938][comment] Don't use tabs for indentation

[centos-ci]

URL: https://github.com/SSSD/sssd/pull/938
Title: #938: Don't use tabs for indentation

centos-ci commented:
"""
Can one of the admins verify this patch?
"""

See the full comment at https://github.com/SSSD/sssd/pull/938#issuecomment-553510508