taskdump: remove crate disambiguators from output (#8264)

tokio/src/runtime/task/trace/symbol.rs

@@ -65,7 +65,8 @@ impl Eq for Symbol {}
 impl fmt::Display for Symbol {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if let Some(name) = self.symbol.name() {
-            let name = name.to_string();
+            // Printing this using :# formatting omits crate disambiguators.
+            let name = format!("{name:#}");
             let name = if let Some((name, _)) = name.rsplit_once("::") {
                 name
             } else {

tokio/tests/task_trace_self.rs

@@ -147,7 +147,7 @@ fn trace_leaf_for_test(meta: &TraceMeta, log: &mut Vec<Vec<String>>) {
     for frame in bt.frames() {
         for symbol in frame.symbols() {
             if let Some(name) = symbol.name() {
-                names.push(strip_symbol_hash(&format!("{name}")).to_owned());
+                names.push(strip_symbol_hash(&format!("{name:#}")).to_owned());
             }
         }
     }