Trivial: Fix incorrect comment text

Change-Id: Ia6ec15f11a535a8de5769569d75e81094caed171

Author: Tang Chen

openstackclient/volume/v1/snapshot.py

@@ -249,7 +249,7 @@ def get_parser(self, prog_name):
             action='append',
             default=[],
             help='Property to remove from snapshot '
-                 '(repeat option to remove multiple values)',
+                 '(repeat option to remove multiple properties)',
             required=True,
         )
         return parser

openstackclient/volume/v2/snapshot.py

@@ -240,7 +240,7 @@ def get_parser(self, prog_name):
             action='append',
             default=[],
             help='Property to remove from snapshot '
-                 '(repeat option to remove multiple values)',
+                 '(repeat option to remove multiple properties)',
         )
         return parser
 

openstackclient/volume/v2/volume_type.py

@@ -57,7 +57,7 @@ def get_parser(self, prog_name):
             '--property',
             metavar='<key=value>',
             action=parseractions.KeyValueAction,
-            help='Set a property on this volume type'
+            help='Set a property on this volume type '
                  '(repeat option to set multiple properties)',
         )
         return parser