Found by Clang's static analyzer.
@ -642,7 +642,7 @@ fill_number(_PyUnicodeWriter *writer, const NumberFieldWidths *spec,
writer->buffer, writer->pos,
digits, d_pos, spec->n_remainder);
writer->pos += spec->n_remainder;
d_pos += spec->n_remainder;
/* d_pos += spec->n_remainder; */
}
if (spec->n_rpadding) {