[PATCH v2] docs: admin-guide: Adjust title underline length

[PATCH v2] docs: admin-guide: Adjust title underline length

[Fabio Estevam]

The following warning is seen when building 'make htmldocs':

Documentation/admin-guide/sysctl/kernel.rst:397: WARNING: Title underline too short.

Fix it by adjusting the title underline length appropriately.

Fixes: 725d8c9a2cc5 ("hung_task: allow printing warnings every check interval")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
Changes since v1:
- Added Fixes tag
- Sent to Andrew as the commit that generates the warning comes
from his tree (Jonathan)

 Documentation/admin-guide/sysctl/kernel.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 2e36620ec1e4..8af424dd0364 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -394,7 +394,7 @@ This file shows up if CONFIG_DETECT_HUNG_TASK is enabled.
 
 
 hung_task_interval_warnings:
-===================
+============================
 
 The same as hung_task_warnings, but set the number of interval
 warnings to be issued about detected hung tasks during check
-- 
2.17.1