Function: printp
Section: programming/specific
C-Name: printp
Prototype: vs*
Help: printp({str}*): outputs its string arguments (in prettymatrix format)
 ending with a newline.
Description:
 (?gen,...):void  pari_printf("${2 format_string}\n"${2 format_args})
Doc: outputs its arguments in prettymatrix format, ending with a
 newline. The arguments are converted to strings following the rules in
 \secref{se:strings}.
 \bprog
 ? m = matid(2);
 ? print(m)  \\ raw format
 [1, 0; 0, 1]
 ? printp(m) \\ prettymatrix format

 [1 0]

 [0 1]
 @eprog
