[cocci] Moving string literals with SmPL?

Hello,

I would appreciate if another source code transformation can be achieved
also by the means of the semantic patch language.
Thus I tried the following SmPL script variant out.

// See also:
// crypto_rng_show()
// https://elixir.bootlin.com/linux/v6.18-rc4/source/crypto/rng.c#L82-L86
@adjustment@
constant char[] last_literal, literal;
expression context;
@@
-seq_printf(context, literal);
 seq_printf(context,
+           literal
            last_literal,
            ...);


Unfortunately, I am wondering about the following information.

Questionable test result (according to the software combination “Coccinelle 1.3.0”):
Markus_Elfring@Sonne:…/Projekte/Coccinelle/janitor> /usr/bin/spatch --parse-cocci combine_selected_seq_printf_calls.cocci
…
plus: parse error: 
  File "combine_selected_seq_printf_calls.cocci", line 11, column 12, charpos = 267
  around = 'last_literal',
  whole content =             last_literal,


Under which circumstances will such data processing become better supported?
http://www.en.cppreference.com/w/c/language/string_literal.html

Regards,
Markus