inconsistent_digit_grouping: some inconsistent groupings are allowed

[barafael]

A literal which appears inconsistent to me is accepted by clippy:

https://play.rust-lang.org/?gist=7f2db0df838ddcc3d7cbe6200dfbf064&version=undefined

I am not sure if this is intentional, so I thought I'd report.

[oli-obk]

Yea this is intentional. We don't know the locale of the user and we should not be using it if we did. iirc chinese number splitting is done this way.