Documentation: bpf: Add missing line break separator in node_data struct code block

Stephen Rothwell reported htmldocs warning when merging bpf-next tree,
which was the same warning as reported by kernel test robot:

Documentation/bpf/graph_ds_impl.rst:62: ERROR: Error in "code-block" directive:
maximum 1 argument(s) allowed, 12 supplied.

The error is due to Sphinx confuses node_data struct declaration with
code-block directive option.

Fix the warning by separating the code-block marker with node_data struct
declaration.

Link: https://lore.kernel.org/linux-next/[email protected]/
Link: https://lore.kernel.org/linux-doc/[email protected]/
Fixes: c31315c3aa0929 ("bpf, documentation: Add graph documentation for non-owning refs")
Reported-by: Stephen Rothwell <[email protected]>
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Bagas Sanjaya <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/Documentation/bpf/graph_ds_impl.rst b/Documentation/bpf/graph_ds_impl.rst
index 8bbf1815efe7..61274622b71d 100644
--- a/Documentation/bpf/graph_ds_impl.rst
+++ b/Documentation/bpf/graph_ds_impl.rst
@@ -60,6 +60,7 @@ The new-style data structures are intrusive and are defined similarly to their
 vanilla kernel counterparts:
 
 .. code-block:: c
+
         struct node_data {
           long key;
           long data;