"ndctl destroy-namespace --help" page display below two -v option:
[1]-v, --verbose
        Emit debug messages for the namespace operation
[2]-v, --verbose
        Emit debug messages for the namespace destruction operation

Delete the first one which included from xable-namespace-options.txt

Signed-off-by: Yi Zhang <[email protected]>
---
 Documentation/ndctl-destroy-namespace.txt | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Documentation/ndctl-destroy-namespace.txt 
b/Documentation/ndctl-destroy-namespace.txt
index ea6d285..3ebb0e8 100644
--- a/Documentation/ndctl-destroy-namespace.txt
+++ b/Documentation/ndctl-destroy-namespace.txt
@@ -14,7 +14,15 @@ include::namespace-description.txt[]
 
 OPTIONS
 -------
-include::xable-namespace-options.txt[]
+<namespace>::
+A 'namespaceX.Y' device name. The keyword 'all' can be specified to carry out
+the operation on every namespace in the system, optionally filtered by region
+(see --region=option)
+
+-r::
+--region=::
+include::xable-region-options.txt[]
+
 -f::
 --force::
        Unless this option is specified the 'destroy namespace'
@@ -26,7 +34,6 @@ include::xable-namespace-options.txt[]
 --verbose::
        Emit debug messages for the namespace destruction operation
 
-
 SEE ALSO
 --------
 linkndctl:ndctl-create-namespace[1]
-- 
2.5.0

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