docs: 补充注释与格式化

crates/oxide_vm/tests/destructuring_tests.rs

@@ -88,10 +88,9 @@ fn function_and_method_parameter_destructuring() {
     assert_num(result, 10.0);
 }
 
-// Regression: a for-of whose assignment target has a NESTED rest pattern (the rest
-// element is itself a pattern, e.g. `[...[x]]`) used to loop forever / error, because the
-// counter undercounted the rest target's instructions vs the emitter, corrupting the loop's
-// jump offsets. (Object rest with a nested target is a syntax error per spec, so untested.)
+// 回归：赋值目标含嵌套 rest 模式（rest 元素本身是模式，如 `[...[x]]`）的 for-of
+// 曾无限循环 / 报错，因为计数器相对 emitter 少计了 rest 目标的指令，破坏了循环跳转
+// 偏移。（对象 rest 嵌套目标按规范是语法错误，故不测。）
 #[test]
 fn for_of_assignment_nested_rest_target_runs_once() {
     let mut vm = Vm::new();
@@ -109,7 +108,7 @@ fn for_of_assignment_nested_rest_empty_body_binds_inner() {
 #[test]
 fn for_of_assignment_nested_rest_with_leading_element() {
     let mut vm = Vm::new();
-    // outer iterates once; a=1, rest=[2,3,4], then [x,y] from rest -> x=2, y=3
+    // 外层迭代一次；a=1，rest=[2,3,4]，再从 rest 解构 [x,y] -> x=2, y=3
     let result = eval(&mut vm, "var a,x,y; for([a,...[x,y]] of [[1,2,3,4]]){} a*100+x*10+y").unwrap();
     assert_num(result, 123.0);
 }