clippy::disallowed_script_idents has false positive if there is an _ underscore in the ident

[wbcat]

Summary

The lint produces false positives if there is an underscore _ in/after the ident, not if _ is at the beginning of the ident

Lint Name

clippy::disallowed_script_idents

Reproducer

I tried this code:

#![warn(clippy::disallowed_script_idents)]
fn main() {
	const ÄÖÜ: u8 = 0;
	const _ÄÖÜ: u8 = 0;
	const Ä_ÖÜ: u8 = 0;
	const ÄÖ_Ü: u8 = 0;
	const ÄÖÜ_: u8 = 0;
	let äöüß = 1;
	let _äöüß = 1;
	let ä_öüß = 1;
	let äö_üß = 1;
	let äöü_ß = 1;
	let äöüß_ = 1;
}

I saw this happen:
cargo clippy

warning: identifier `Ä_ÖÜ` has a Unicode script that is not allowed by configuration: Common
 --> src/main.rs:7:8
  |
7 |     const Ä_ÖÜ: u8 = 0;
  |           ^^^^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_script_idents

I expected to see this happen:

Version

Additional Labels

No response