diff --git a/en/src/basic-types/numbers.md b/en/src/basic-types/numbers.md
index 72d0a28..32a1c95 100644
--- a/en/src/basic-types/numbers.md
+++ b/en/src/basic-types/numbers.md
@@ -24,7 +24,7 @@ fn main() {
 2. 🌟
 ```rust,editable
 
-//  Fill the blank
+// Fill the blank
 fn main() {
     let v: u16 = 38_u8 as __;
 
diff --git a/en/src/comments-docs.md b/en/src/comments-docs.md
index 3c0894d..c4c408e 100644
--- a/en/src/comments-docs.md
+++ b/en/src/comments-docs.md
@@ -240,7 +240,7 @@ Besides jump into the standard library, you can also jump to another module in t
 // in lib.rs
 
 mod a {
-    ///  Add four to the given value and return a [`Option`] type
+    /// Add four to the given value and return a [`Option`] type
     /// [`crate::MySpecialFormatter`]
     pub fn add_four(x: i32) -> Option<i32> {
         Some(x + 4)
diff --git a/solutions/functional-programing/closure.md b/solutions/functional-programing/closure.md
index 50ba556..4a8fea2 100644
--- a/solutions/functional-programing/closure.md
+++ b/solutions/functional-programing/closure.md
@@ -46,7 +46,7 @@ fn main() {
      // A non-copy type.
      let movable = Box::new(3);
 
-     //  A copy type would copy into the closure leaving the original untouched.
+     // A copy type would copy into the closure leaving the original untouched.
      // A non-copy must move and so `movable` immediately moves into
      // the closure.
      let consume = || {
@@ -55,7 +55,7 @@ fn main() {
      };
 
      consume();
-    //  consume();
+     // consume();
 }
 
 fn take<T>(_v: T) {
@@ -68,7 +68,7 @@ fn main() {
      // A non-copy type.
      let movable = Box::new(3);
 
-     //  A copy type would copy into the closure leaving the original untouched.
+     // A copy type would copy into the closure leaving the original untouched.
      // A non-copy must move and so `movable` immediately moves into
      // the closure.
      let consume = || {
diff --git a/zh-CN/src/basic-types/char-bool-unit.md b/zh-CN/src/basic-types/char-bool-unit.md
index 4bfdcca..08273c6 100644
--- a/zh-CN/src/basic-types/char-bool-unit.md
+++ b/zh-CN/src/basic-types/char-bool-unit.md
@@ -3,7 +3,7 @@
 ### 字符
 1. 🌟
 ```rust,editable
-//  修改2处 `assert_eq!` 让代码工作
+// 修改2处 `assert_eq!` 让代码工作
 
 use std::mem::size_of_val;
 fn main() {
@@ -19,7 +19,7 @@ fn main() {
 
 2. 🌟
 ```rust,editable
-//  修改一行让代码正常打印
+// 修改一行让代码正常打印
 fn main() {
     let c1 = "中";
     print_char(c1);
diff --git a/zh-CN/src/basic-types/numbers.md b/zh-CN/src/basic-types/numbers.md
index a949f05..b46b7e4 100644
--- a/zh-CN/src/basic-types/numbers.md
+++ b/zh-CN/src/basic-types/numbers.md
@@ -34,7 +34,7 @@ fn main() {
 
 ```rust,editable
 
-//  修改 `assert_eq!` 让代码工作
+// 修改 `assert_eq!` 让代码工作
 fn main() {
     let x = 5;
     assert_eq!("u32".to_string(), type_of(&x));
diff --git a/zh-CN/src/comments-docs.md b/zh-CN/src/comments-docs.md
index 546a270..850a5ed 100644
--- a/zh-CN/src/comments-docs.md
+++ b/zh-CN/src/comments-docs.md
@@ -205,7 +205,7 @@ pub fn add_three(x: i32) -> Option<i32> {
 // in lib.rs
 
 mod a {
-    ///  Add four to the given value and return a [`Option`] type
+    /// Add four to the given value and return a [`Option`] type
     /// [`crate::MySpecialFormatter`]
     pub fn add_four(x: i32) -> Option<i32> {
         Some(x + 4)