[Fix] correct Guide article example for Iterate Through the Keys of an Object with a for...in Statement (#35197)

* fix: added dot btwn [user] and online

* fix: corrected example for other languages

guide/arabic/certifications/javascript-algorithms-and-data-structures/basic-data-structures/-iterate-through-the-keys-of-an-object-with-a-for...in-statement/index.md

@@ -12,23 +12,29 @@ localeTitle:  يتكرر عبر مفاتيح كائن مع لـ ... في بيا
 
 ### مثال 1:
 
- `for (let user in obj) { 
+```javascript
+
+for (let user in obj) {
   if(obj.user.online === true) {
     //code
   }
-  } 
+}
-` 
+
+```
 
 *   يوضح المثال 2 كيفية استخدام الترميز `[square-bracket]` في تنفيذ الشفرة.
 
 ### المثال 2:
 
- `for (let user in obj) { 
+```javascript
-    if(obj[user]online === true) { 
+
+for (let user in obj) {
+  if(obj[user].online === true) {
     //code
   }
-  } 
+}
-` 
+
+```
 
 ### حل:
 

guide/chinese/certifications/javascript-algorithms-and-data-structures/basic-data-structures/-iterate-through-the-keys-of-an-object-with-a-for...in-statement/index.md

@@ -17,7 +17,7 @@ for (let user in obj) {
   if(obj.user.online === true) {
     //code
   }
-  } 
+}
 ```
 
 *   示例2演示了如何使用`[square-bracket]`表示法执行代码。
@@ -26,10 +26,10 @@ for (let user in obj) {
 
 ```javascript
 for (let user in obj) {
-    if(obj[user]online === true) { 
+  if(obj[user].online === true) {
     //code
   }
-  } 
+}
 ```
 
 ### 解：

guide/english/certifications/javascript-algorithms-and-data-structures/basic-data-structures/-iterate-through-the-keys-of-an-object-with-a-for...in-statement/index.md

@@ -16,7 +16,7 @@ for (let user in obj) {
   if(obj.user.online === true) {
     //code
   }
-  }
+}
 
 ```
 
@@ -27,10 +27,10 @@ for (let user in obj) {
 ```javascript
 
 for (let user in obj) {
-    if(obj[user]online === true) {
+  if(obj[user].online === true) {
     //code
   }
-  }
+}
 
 ```
 

guide/portuguese/certifications/javascript-algorithms-and-data-structures/basic-data-structures/-iterate-through-the-keys-of-an-object-with-a-for...in-statement/index.md

@@ -17,7 +17,7 @@ for (let user in obj) {
   if(obj.user.online === true) {
     //code
   }
-  } 
+}
 ```
 
 *   O exemplo 2 demonstra como usar a notação `[square-bracket]` o código será executado.
@@ -26,10 +26,10 @@ for (let user in obj) {
 
 ```javascript
 for (let user in obj) {
-    if(obj[user]online === true) { 
+  if(obj[user].online === true) {
     //code
   }
-  } 
+}
 ```
 
 ### Solução:

guide/russian/certifications/javascript-algorithms-and-data-structures/basic-data-structures/-iterate-through-the-keys-of-an-object-with-a-for...in-statement/index.md

@@ -17,7 +17,7 @@ for (let user in obj) {
   if(obj.user.online === true) {
     //code
   }
-  } 
+}
 ```
 
 *   В примере 2 показано, как использовать нотацию с `[square-bracket]` код будет выполнен.
@@ -26,10 +26,10 @@ for (let user in obj) {
 
 ```javascript
 for (let user in obj) {
-    if(obj[user]online === true) { 
+  if(obj[user].online === true) {
     //code
   }
-  } 
+}
 ```
 
 ### Решение:

guide/spanish/certifications/javascript-algorithms-and-data-structures/basic-data-structures/-iterate-through-the-keys-of-an-object-with-a-for...in-statement/index.md

@@ -17,7 +17,7 @@ for (let user in obj) {
   if(obj.user.online === true) {
     //code
   }
-  } 
+}
 ```
 
 *   El ejemplo 2 demuestra cómo usar la notación `[square-bracket]` se ejecutará el código.
@@ -26,10 +26,10 @@ for (let user in obj) {
 
 ```javascript
 for (let user in obj) {
-    if(obj[user]online === true) { 
+  if(obj[user].online === true) {
     //code
   }
-  } 
+}
 ```
 
 ### Solución: