arguments passed to printf are more generic

arguments passed to printf are more generic

On systems that /bin/sh is served by shells other than bash, or
shells that don't implement the same syntax as the bash printf builtin,
printf -- fails to produce the output necessary for standalone operation.

The test case for this was SmartOS, which uses ksh93 as its /bin/sh.

This change uses the more generic method of passing a format parameter
of a single string, and then the argument to replace it with.