linux-next: build warning after merge of the bpf-next tree

Hi all,

After merging the bpf-next tree, today's linux-next build (htmldocs)
produced this warning:

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

.. code-block:: c
        struct node_data {
          long key;
          long data;
          struct bpf_rb_node node;
        };

        struct bpf_spin_lock glock;
        struct bpf_rb_root groot __contains(node_data, node);


Introduced by commit

  c31315c3aa09 ("bpf, documentation: Add graph documentation for non-owning refs")

-- 
Cheers,
Stephen Rothwell