Make unreadable_literal useful even when we use numbers with two decimals

[frederikhors]

What it does

In a project there are a lot of numbers like this: 12345678900 which means 123456789.00, maybe because we are using rust_decimal::Decimal::new(12345678900, 2).

unreadable_literal makes me write instead: 12_345_678_900 which as you can see is misleading during the code review.

Why not also suggest 1_23_45_67_89_00, maybe changing the settings?

Advantage

No response

Drawbacks

No response

Example

<code>

Could be written as:

<code>