test_saslprep: Apply proper indentation

Michael Paquier <michael@paquier.xyz>

Commit: 015d32016d845f8a29b3ec3ab7fa98a69cea1a0f
Author: Michael Paquier <michael@paquier.xyz>
Date: 2026-03-19T04:42:24Z
test_saslprep: Apply proper indentation

Noticed before koel has the idea to complain.  Rebase thinko from commit
aa73838a5c94.

Files