Update some documentation in "Scalar multiplication" in nmod_poly
Update some documentation in "Scalar multiplication" in nmod_poly

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