docs: fix MANUAL formatting problems

1) Missing closing code backticks (```) in s3.md causes formatting problems
2) Pandoc requires blank lines before ATX headings

docs/content/commands/rclone_mount.md

@@ -475,6 +475,7 @@ Mount option syntax includes a few extra options treated specially:
 - `vv...` will be transformed into appropriate `--verbose=N`
 - standard mount options like `x-systemd.automount`, `_netdev`, `nosuid` and alike
   are intended only for Automountd and ignored by rclone.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_nfsmount.md

@@ -476,6 +476,7 @@ Mount option syntax includes a few extra options treated specially:
 - `vv...` will be transformed into appropriate `--verbose=N`
 - standard mount options like `x-systemd.automount`, `_netdev`, `nosuid` and alike
   are intended only for Automountd and ignored by rclone.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_serve_dlna.md

@@ -36,6 +36,7 @@ default "rclone (hostname)".
 
 Use `--log-trace` in conjunction with `-vv` to enable additional debug
 logging of all UPNP traffic.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_serve_docker.md

@@ -51,6 +51,7 @@ directory with book-keeping records of created and mounted volumes.
 All mount and VFS options are submitted by the docker daemon via API, but
 you can also provide defaults on the command line as well as set path to the
 config file and cache directory or adjust logging verbosity.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_serve_ftp.md

@@ -33,6 +33,7 @@ then using Authentication is advised - see the next section for info.
 By default this will serve files without needing a login.
 
 You can set a single username and password with the --user and --pass flags.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_serve_http.md

@@ -134,6 +134,7 @@ The password file can be updated while rclone is running.
 Use `--realm` to set the authentication realm.
 
 Use `--salt` to change the password hashing salt from the default.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_serve_s3.md

@@ -176,6 +176,7 @@ certificate authority certificate.
 --min-tls-version is minimum TLS version that is acceptable. Valid
   values are "tls1.0", "tls1.1", "tls1.2" and "tls1.3" (default
   "tls1.0").
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects

docs/content/commands/rclone_serve_webdav.md

@@ -163,6 +163,7 @@ The password file can be updated while rclone is running.
 Use `--realm` to set the authentication realm.
 
 Use `--salt` to change the password hashing salt from the default.
+
 ## VFS - Virtual File System
 
 This command uses the VFS layer. This adapts the cloud storage objects