chore: checkpoint before Python removal

vendor/tokio/tests/fs_write.rs

@@ -0,0 +1,16 @@
+#![warn(rust_2018_idioms)]
+#![cfg(all(feature = "full", not(target_os = "wasi")))] // WASI does not support all fs operations
+
+use tempfile::tempdir;
+use tokio::fs;
+
+#[tokio::test]
+async fn write() {
+    let dir = tempdir().unwrap();
+    let path = dir.path().join("test.txt");
+
+    fs::write(&path, "Hello, World!").await.unwrap();
+
+    let contents = fs::read_to_string(&path).await.unwrap();
+    assert_eq!(contents, "Hello, World!");
+}