function copyVector( out, src ) {
	gcopy( src.shape[0], src.data, src.strides[0], src.offset, out.data, out.strides[0], out.offset ); // eslint-disable-line max-len
	return out;
}
Copies vector elements to another vector.

@private
@param {ndarray} out - destination vector
@param {ndarray} src - source vector
@returns {ndarray} destination vector