Fix typo in gnt-group manpage

The --ipol-disk-templates parameter should actually be
--ipolicy-disk-templates.

Signed-off-by: Ben Lipton <ben.lipton@gmail.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

man/gnt-group.rst

@@ -32,7 +32,7 @@ ADD
 | [\--specs-disk-size *spec-param*=*value* [,*spec-param*=*value*...]]
 | [\--specs-mem-size *spec-param*=*value* [,*spec-param*=*value*...]]
 | [\--specs-nic-count *spec-param*=*value* [,*spec-param*=*value*...]]
-| [\--ipol-disk-templates *template* [,*template*...]]
+| [\--ipolicy-disk-templates *template* [,*template*...]]
 | [\--disk-state *diskstate*]
 | [\--hypervisor-state *hvstate*]
 | {*group*}
@@ -67,7 +67,7 @@ parameters for the node group; please see the section about
 **gnt-cluster add** in **gnt-cluster**\(8) for more information about
 disk parameters
 
-The ``--specs-...`` and ``--ipol-disk-templates`` options specify
+The ``--specs-...`` and ``--ipolicy-disk-templates`` options specify
 instance policies on the node group, and are documented in the
 **gnt-cluster**\(8) man page.
 
@@ -107,7 +107,7 @@ MODIFY
 | [\--specs-disk-size *spec-param*=*value* [,*spec-param*=*value*...]]
 | [\--specs-mem-size *spec-param*=*value* [,*spec-param*=*value*...]]
 | [\--specs-nic-count *spec-param*=*value* [,*spec-param*=*value*...]]
-| [\--ipol-disk-templates *template* [,*template*...]]
+| [\--ipolicy-disk-templates *template* [,*template*...]]
 | {*group*}
 
 Modifies some parameters from the node group.
@@ -120,7 +120,7 @@ The ``--node-parameters``, ``--alloc-policy``, ``-D
 (--disk-parameters)`` options are documented in the **add** command
 above.
 
-The ``--specs-...`` and ``--ipol-disk-templates`` options specify
+The ``--specs-...`` and ``--ipolicy-disk-templates`` options specify
 instance policies on the node group, and are documented in the
 **gnt-cluster**\(8) man page.