printk format "%4.4s"

Hi, all

I have a question about printk format.

Can printk format use "%4.4s"?
This format is used following source.

#############
drivers/acpi/tables/tbinstal.c
                ACPI_ERROR((AE_INFO,
                            "Table has invalid signature [%4.4s], must be SSDT, PSDT or OEMx",
                            table_desc->pointer->signature));

##############
At least, my dmesg is buggy output like that..

##############
$ dmesg
(snip)
ACPI Warning (tbutils-0158): Incorrect checksum in table [  ^E礑 -  00, should b
e F6 [20070126]
ACPI Error (tbinstal-0134): Table has invalid signature [  ^E礑, must be SSDT, P
SDT or OEMx [20070126]
(snip)
##############

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