!182 修复cephadm卸载过程中command not find的问题

From: @wangzengliang1 
Reviewed-by: @liuqinfei 
Signed-off-by: @liuqinfei

ceph.spec

@@ -125,7 +125,7 @@
 #################################################################################
 Name:		ceph
 Version:	16.2.7
-Release:	17
+Release:	18
 %if 0%{?fedora} || 0%{?rhel} || 0%{?openEuler}
 Epoch:		2
 %endif
@@ -1559,7 +1559,7 @@ exit 0
 
 %if ! 0%{?suse_version}
 %postun -n cephadm
-[$1 -ne 0] || userdel cephadm || :
+[ $1 -ne 0 ] || userdel cephadm || :
 %endif
 
 %files -n cephadm
@@ -2504,6 +2504,9 @@ exit 0
 %config %{_sysconfdir}/prometheus/ceph/ceph_default_alerts.yml
 
 %changelog
+* Sat Mar 25 2023 wangzengliang <wangzengliang2@huawei.com> - 2:16.2.7-18
+- format userdel command
+
 * Wed Mar 1 2023 wangzengliang <wangzengliang2@huawei.com> - 2:16.2.7-17
 - fix error for uninstall cephadm