bpf, docs: Fix non-standard line break

Even though the kernel's coding-style document does not explicitly
state this, we generally put a newline after the semicolon of every
C language statement to enhance code readability.

Adjust the placement of newlines to adhere to this convention.

Reported-by: Chen Linxuan <[email protected]>
Signed-off-by: WangYuli <[email protected]>
Reviewed-by: Yanteng Si <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>

Author: Avenger-285714

Documentation/bpf/bpf_iterators.rst

@@ -323,8 +323,8 @@ Now, in the userspace program, pass the pointer of struct to the
 
 ::
 
-  link = bpf_program__attach_iter(prog, &opts); iter_fd =
-  bpf_iter_create(bpf_link__fd(link));
+  link = bpf_program__attach_iter(prog, &opts);
+  iter_fd = bpf_iter_create(bpf_link__fd(link));
 
 If both *tid* and *pid* are zero, an iterator created from this struct
 ``bpf_iter_attach_opts`` will include every opened file of every task in the