chore(turbopack): Fix a few syntactic nits (#77310)

Noticed some opportunities for minor cleanup while reading through some of this code.

Author: bgw

turbopack/crates/turbo-tasks-backend/src/backend/mod.rs

@@ -979,7 +979,7 @@ impl<B: BackingStorage> TurboTasksBackendInner<B> {
         if !parent_task.is_transient() {
             let parent_task_type = self.lookup_task_type(parent_task);
             panic!(
-                "Calling transient function {} from persistent function function {} is not allowed",
+                "Calling transient function {} from persistent function {} is not allowed",
                 task_type.get_name(),
                 parent_task_type.map_or("unknown", |t| t.get_name())
             );
@@ -1068,7 +1068,7 @@ impl<B: BackingStorage> TurboTasksBackendInner<B> {
         task.invalidate_serialization();
     }
 
-    fn get_task_description(&self, task_id: TaskId) -> std::string::String {
+    fn get_task_description(&self, task_id: TaskId) -> String {
         self.lookup_task_type(task_id).map_or_else(
             || format!("{task_id:?} transient"),
             |task_type| task_type.to_string(),
@@ -2047,7 +2047,7 @@ impl<B: BackingStorage> Backend for TurboTasksBackend<B> {
         self.0.invalidate_serialization(task_id, turbo_tasks);
     }
 
-    fn get_task_description(&self, task: TaskId) -> std::string::String {
+    fn get_task_description(&self, task: TaskId) -> String {
         self.0.get_task_description(task)
     }
 

turbopack/crates/turbopack-node/src/transforms/postcss.rs

@@ -43,7 +43,6 @@ use crate::{
 struct PostCssProcessingResult {
     css: String,
     map: Option<String>,
-    #[turbo_tasks(trace_ignore)]
     assets: Option<Vec<EmittedAsset>>,
 }
 

turbopack/crates/turbopack-node/src/transforms/util.rs

@@ -4,13 +4,13 @@ use anyhow::Result;
 use serde::{Deserialize, Serialize};
 use serde_json::Value as JsonValue;
 use turbo_rcstr::RcStr;
-use turbo_tasks::{ResolvedVc, TryJoinIterExt};
+use turbo_tasks::{trace::TraceRawVcs, NonLocalValue, ResolvedVc, TryJoinIterExt};
 use turbo_tasks_fs::{File, FileContent, FileSystem};
 use turbopack_core::{
     asset::AssetContent, server_fs::ServerFileSystem, virtual_source::VirtualSource,
 };
 
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Clone)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Clone, TraceRawVcs, NonLocalValue)]
 #[serde(rename_all = "camelCase")]
 pub struct EmittedAsset {
     file: RcStr,