Match underline length to titles for consistency.

Signed-off-by: Diego Viola <diego.viola@gmail.com>
---
 Documentation/filesystems/ext4/atomic_writes.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/filesystems/ext4/atomic_writes.rst b/Documentation/filesystems/ext4/atomic_writes.rst
index f65767df3620..1f7780924400 100644
--- a/Documentation/filesystems/ext4/atomic_writes.rst
+++ b/Documentation/filesystems/ext4/atomic_writes.rst
@@ -2,7 +2,7 @@
 .. _atomic_writes:
 
 Atomic Block Writes
--------------------------
+-------------------
 
 Introduction
 ~~~~~~~~~~~~
@@ -133,7 +133,7 @@ atomic writes are typically constrained to small sizes
 
 
 Handling Journal transactions
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To support multi-fsblock atomic writes, we ensure enough journal credits are
 reserved during:
-- 
2.49.0