style: cargo fmt sweep under rustc 1.97.1 (toolchain reformat, no semantic change)

tests/stack_diag.rs

@@ -42,9 +42,15 @@ fn run_as_child_if_requested() {
         let opts = match mode.as_str() {
             "rust_overflow" | "ffi_tier1" => SpawnOpts::default(),
             // Small guard: the canary's 96 KiB displacement clears it.
-            "ffi_tier2" => SpawnOpts { guard_size: Some(4096), ..SpawnOpts::default() },
+            "ffi_tier2" => SpawnOpts {
+                guard_size: Some(4096),
+                ..SpawnOpts::default()
+            },
             // Enough reserve: the same frame simply fits.
-            "ffi_clean" => SpawnOpts { stack_reserve: Some(256 * 1024), ..SpawnOpts::default() },
+            "ffi_clean" => SpawnOpts {
+                stack_reserve: Some(256 * 1024),
+                ..SpawnOpts::default()
+            },
             other => panic!("unknown subtest {other}"),
         };
         let is_rust = mode == "rust_overflow";
@@ -92,8 +98,14 @@ fn rust_overflow_dies_with_tier1_message() {
         err.contains("overflowed its stack") && err.contains("in the guard region"),
         "missing tier-1 diagnostic; stderr:\n{err}"
     );
-    assert!(err.contains("reserve=65536"), "wrong reserve in message:\n{err}");
-    assert!(err.contains("guard=1048576"), "wrong guard in message:\n{err}");
+    assert!(
+        err.contains("reserve=65536"),
+        "wrong reserve in message:\n{err}"
+    );
+    assert!(
+        err.contains("guard=1048576"),
+        "wrong guard in message:\n{err}"
+    );
 }
 
 #[test]