[PATCH v3] Documentation: stable: Document alternative for referring upstream commit hash

[Salvatore Bonaccorso]

Additionally to the "commit <sha1> upstream." variant, "[ Upstream
commit <sha1> ]" is used as well as alternative to refer to the upstream
commit hash.

Signed-off-by: Salvatore Bonaccorso <carnil@xxxxxxxxxx>
---
Changes in v3:
 - Revert to initial version as not adding the code-block:: none will
   reformat the block differently than the first variant.

Changes in v2:
 - Drop extra RST markup which just only clutters things without any
   advantage.

 Documentation/process/stable-kernel-rules.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/process/stable-kernel-rules.rst b/Documentation/process/stable-kernel-rules.rst
index c61865e91f52..2fd8aa593a28 100644
--- a/Documentation/process/stable-kernel-rules.rst
+++ b/Documentation/process/stable-kernel-rules.rst
@@ -97,6 +97,12 @@ text, like this:
 
     commit <sha1> upstream.
 
+or alternatively:
+
+.. code-block:: none
+
+    [ Upstream commit <sha1> ]
+
 Additionally, some patches submitted via :ref:`option_1` may have additional
 patch prerequisites which can be cherry-picked. This can be specified in the
 following format in the sign-off area:
-- 
2.37.2