typo in documentation of fmpz_poly.h
typo in documentation of fmpz_poly.h

wbhart/flint2,wbhart/flint2,fredrik-johansson/flint2,dsroche/flint2,dsroche/flint2,jpflori/flint2,fredrik-johansson/flint2,wbhart/flint2,dsroche/flint2,fredrik-johansson/flint2,jpflori/flint2,jpflori/flint2,jpflori/flint2,dsroche/flint2