this used a modified numliterals that:
 - do not rewrite 1L as 1
 - rewrite 01 as 1 and only rewrite as 0o1 when more than 2 digits,
because we had mostly dates written as DateTime(2019, 01, 10) that we
want to rewrite as DateTime(2019, 1, 10), not DateTime(2019, 0o1, 10)