Documentation/filesystems: sharedsubtree: add section headings

Several of the sections are missing underlines. This makes the
generated contents have missing entries, so add the underlines.

Fixes: 16c01b20ae05 ("doc/filesystems: more mount cleanups")
Fixes: 9cfcceea8f7e ("[PATCH] Complete description of shared subtrees.")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230508055938.6550-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/filesystems/sharedsubtree.rst b/Documentation/filesystems/sharedsubtree.rst
index d83395354250d9ca02dc19a38cdf9762733ded04..1cf56489ed484dcf77581e6be1faa490e600a3ab 100644 (file)
--- a/Documentation/filesystems/sharedsubtree.rst
+++ b/Documentation/filesystems/sharedsubtree.rst
@@ -147,6 +147,7 @@ replicas continue to be exactly same.
 
 
 3) Setting mount states
+-----------------------
 
        The mount command (util-linux package) can be used to set mount
        states::
@@ -612,6 +613,7 @@ replicas continue to be exactly same.
 
 
 6) Quiz
+-------
 
        A. What is the result of the following command sequence?
 
@@ -673,6 +675,7 @@ replicas continue to be exactly same.
                /mnt/1/test be?
 
 7) FAQ
+------
 
        Q1. Why is bind mount needed? How is it different from symbolic links?
                symbolic links can get stale if the destination mount gets
@@ -841,6 +844,7 @@ replicas continue to be exactly same.
                             tmp  usr tmp usr tmp usr
 
 8) Implementation
+-----------------
 
 8A) Datastructure