ansi .6.1.0050
<CORE>
see also HOLD for old-style forth-formatting words
and PRINTF of the C-style formatting - this word
does repeat the word # for a number of times, until
the argument becomes zero. Hence the result is always
null - it should be used inside of <# and #>
reference: p4_sh_s in ../src/core.c:0153, export CO #S