Function baseline_key 

pub fn baseline_key(violation: &Violation) -> String

The key of one finding in the baseline: its code, its file and its symbol.

The line is deliberately not part of it. A finding that moves down a file when something above it is edited is the same finding, and a baseline keyed by line would turn every unrelated edit into new debt.

use majordomus_cli::capability::builtin::quality::baseline_key;
use majordomus_cli::quality::{Violation, ViolationCode};
let v = Violation::new(
    ViolationCode::RustPublicMissingExample, "a::b", "src/a.rs", Some(9), "none");
assert_eq!(baseline_key(&v), "RUST_PUBLIC_MISSING_EXAMPLE\tsrc/a.rs\ta::b");