[PATCH 5.19] Documentation: ext4: fix cell spacing of table heading on blockmap table

[Bagas Sanjaya <bagasdotme@gmail.com>]

commit 442ec1e5bb7c46c72c41898e13a5744c84cadf51 upstream.

Commit 3103084afcf234 ("ext4, doc: remove unnecessary escaping") removes
redundant underscore escaping, however the cell spacing in heading row of
blockmap table became not aligned anymore, hence triggers malformed table
warning:

Documentation/filesystems/ext4/blockmap.rst:3: WARNING: Malformed table.

+---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| i.i_block Offset   | Where It Points                                                                                                                                                                                                              |
<snipped>...

The warning caused the table not being loaded.

Realign the heading row cell by adding missing space at the first cell
to fix the warning.

Fixes: 3103084afcf234 ("ext4, doc: remove unnecessary escaping")
Cc: stable@kernel.org
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Wang Jianjian <wangjianjian3@huawei.com>
Cc: linux-ext4@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220619072938.7334-1-bagasdotme@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
---

 Seems like this patch is merged to Linus's tree as merge window
 material for 6.0, but it should have been -rc fix material for 5.19
 cycle. Now that the version have been stabilized (and now on 6.0 merge
 window), it should be logical to submit this backport for 5.19 tree.

 Documentation/filesystems/ext4/blockmap.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/filesystems/ext4/blockmap.rst b/Documentation/filesystems/ext4/blockmap.rst
index 2bd990402a5c49..cc596541ce7921 100644
--- a/Documentation/filesystems/ext4/blockmap.rst
+++ b/Documentation/filesystems/ext4/blockmap.rst
@@ -1,7 +1,7 @@
 .. SPDX-License-Identifier: GPL-2.0
 
 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
-| i.i_block Offset   | Where It Points                                                                                                                                                                                                              |
+| i.i_block Offset    | Where It Points                                                                                                                                                                                                              |
 +=====================+==============================================================================================================================================================================================================================+
 | 0 to 11             | Direct map to file blocks 0 to 11.                                                                                                                                                                                           |
 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
-- 
An old man doll... just what I always wanted! - Clara