[PATCH] docs: split subtitle of Submitting patches

[Costa Shulyupin]

Motivation:

The original long page title in the left Content pane spans three lines:

Submitting patches: the essential
  guide to getting your code into
  the kernel

Issues:
- It is not readable.
- It further inflates already overpopulated Contents pane.

The solution:
- Split the long title to title and subtitle.
- Vertical bar '|' in Sphinx-doc introduces empty line to
  make the subtitle closer to the title than to the following text.


Signed-off-by: Costa Shulyupin <costa.shul@xxxxxxxxxx>
---
 Documentation/process/submitting-patches.rst | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/process/submitting-patches.rst b/Documentation/process/submitting-patches.rst
index 7a5619fecb38..051eba1bbc7f 100644
--- a/Documentation/process/submitting-patches.rst
+++ b/Documentation/process/submitting-patches.rst
@@ -1,7 +1,10 @@
 .. _submittingpatches:
 
-Submitting patches: the essential guide to getting your code into the kernel
-============================================================================
+Submitting patches
+==================
+The essential guide to getting your code into the kernel
+
+|
 
 For a person or company who wishes to submit a change to the Linux
 kernel, the process can sometimes be daunting if you're not familiar
-- 
2.40.0