some doc fix

README.md

@@ -132,7 +132,7 @@ for a quick overview of the supported features.
 | Reflection      | `hasattr()/getattr()/setattr()` | ✅       |
 | Import          | `import/from..import`           | ✅       |
 | Context Block   | `with <expr> as <id>:`          | ✅       |
-| Type Annotation | `def  f(a:int, b:float=1)`      | ✅       |
+| Type Annotation | `def f(a:int, b:float=1)`       | ✅       |
 | Generator       | `yield i`                       | ✅       |
 | Decorator       | `@cache`                        | ✅       |
 

README_zh.md

@@ -92,7 +92,7 @@ int main(){
 | 反射         | `hasattr()/getattr()/setattr()` | ✅ |
 | 导入模块     | `import/from..import`           | ✅ |
 | 上下文管理器 | `with <expr> as <id>:`          | ✅ |
-| 类型标注     | `def  f(a:int, b:float=1)`      | ✅ |
+| 类型标注     | `def f(a:int, b:float=1)`      | ✅ |
 | 生成器       | `yield i`                       | ✅ |
 | 装饰器       | `@cache`                        | ✅ |
 

docs/performance.md

@@ -7,7 +7,7 @@ label: Performance
 # Performance
 
 Currently, pkpy is as fast as cpython 3.9.
-**Performance results for cpython 3.9 are applicable to for pkpy.**
+Performance results for cpython 3.9 are applicable to for pkpy.
 
 Here is a benchmark result of `v1.2.6`.
 Files are located in `benchmarks/`.