Function: nfnewprec
Section: number_fields
C-Name: nfnewprec
Prototype: Gp
Help: nfnewprec(nf): transform the number field data nf into new data using
 the current (usually larger) precision.
Doc: transforms the number field $\var{nf}$
 into the corresponding data using current (usually larger) precision. This
 function works as expected if $\var{nf}$ is in fact a $\var{bnf}$ (update
 $\var{bnf}$ to current precision) but may be quite slow (many generators of
 principal ideals have to be computed).
Variant: See also \fun{GEN}{bnfnewprec}{GEN bnf, long prec}
 and \fun{GEN}{bnrnewprec}{GEN bnr, long prec}.
