Postgres 16

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do $r$ begin raise exception '1\n2%4' , 
                             '\n3\n'; 
end $r$;

ERROR:  1\n2\n3\n4
CONTEXT:  PL/pgSQL function inline_code_block line 1 at RAISE


do $r$ begin raise exception E'1\n2%4' , 
                             '\n3\n'; 
end $r$;

ERROR:  1
2\n3\n4
CONTEXT:  PL/pgSQL function inline_code_block line 1 at RAISE


do $r$ begin raise exception '1\n2%4' , 
                             E'\n3\n'; 
end $r$;

ERROR:  1\n2
3
4
CONTEXT:  PL/pgSQL function inline_code_block line 1 at RAISE


do $r$ begin raise exception E'1\n2%4' , 
                             E'\n3\n'; 
end $r$;

ERROR:  1
2
3
4
CONTEXT:  PL/pgSQL function inline_code_block line 1 at RAISE