docs: 补充注释与格式化

crates/oxide_emit/src/stmt/declaration/class_decl.rs

@@ -1,9 +1,9 @@
 //! 类声明语句 emit：`emit_class_declaration_statement` 声明类名并初始化类对象。
 
 use crate::{CompileCtx, Emitter};
+use oxide_bytecode::opcode::OpCode;
 use oxide_ir::inst::Inst;
 use oxide_ir::operand::Operand;
-use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{Statement, VariableDeclarationKind};
 
 impl Emitter {
@@ -23,7 +23,12 @@ impl Emitter {
         ctx.init_var(&name);
         let ctor_reg = self.emit_class(class, ctx)?;
         if let Some(&cell_idx) = ctx.captured_bindings.get(&name) {
-            ctx.inst(Inst::new(OpCode::MAKE_CELL, Operand::Reg(var_reg), Operand::Imm(cell_idx as u16), Operand::None));
+            ctx.inst(Inst::new(
+                OpCode::MAKE_CELL,
+                Operand::Reg(var_reg),
+                Operand::Imm(cell_idx as u16),
+                Operand::None,
+            ));
         } else {
             ctx.inst(Inst::new(OpCode::STORE_VAR, Operand::Reg(var_reg), Operand::Reg(ctor_reg), Operand::None));
         }