[PATCH 7/8] Documentation: s390: extend underline for matrix devices lock

[Bagas Sanjaya]

The underline heading for "The Matrix Devices Lock" section is off-short
by a dash, hence:

Documentation/s390/vfio-ap-locking.rst:15: WARNING: Title underline too short.

The Matrix Devices Lock (drivers/s390/crypto/vfio_ap_private.h)
--------------------------------------------------------------

Extend the underline to match heading text length.

Link:https://lore.kernel.org/linux-next/20220721201058.2a276286@xxxxxxxxxxxxxxxx/
Fixes: e32d3827f3d5b2 ("s390/Docs: new doc describing lock usage by the vfio_ap device driver")
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Bagas Sanjaya <bagasdotme@xxxxxxxxx>
---
 Documentation/s390/vfio-ap-locking.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/s390/vfio-ap-locking.rst b/Documentation/s390/vfio-ap-locking.rst
index cfbb661ea72e63..ab41b0e5dca40e 100644
--- a/Documentation/s390/vfio-ap-locking.rst
+++ b/Documentation/s390/vfio-ap-locking.rst
@@ -12,7 +12,7 @@ will be used to denote instances of the structures herein described::
    struct kvm *kvm;
 
 The Matrix Devices Lock (drivers/s390/crypto/vfio_ap_private.h)
---------------------------------------------------------------
+---------------------------------------------------------------
 
 ::
 
-- 
An old man doll... just what I always wanted! - Clara