impove symbol name normalization

Author: erikdesjardins

collector/src/artifact_stats.rs

@@ -95,7 +95,7 @@ static RUSTC_HASH_REGEX: OnceLock<Regex> = OnceLock::new();
 
 /// Demangle the symbol and remove rustc mangling hashes.
 fn normalize_symbol_name(symbol: &str) -> String {
-    let regex = RUSTC_HASH_REGEX.get_or_init(|| Regex::new(r#"[a-z0-9]{15,16}"#).unwrap());
+    let regex = RUSTC_HASH_REGEX.get_or_init(|| Regex::new(r#"(::)?\b[a-z0-9]{15,17}\b"#).unwrap());
 
     let symbol = rustc_demangle::demangle(symbol).to_string();
     regex.replace_all(&symbol, "").to_string()