Added JavaScript syntax, corrected capitalization & sentence. (#23684)

* Added JavaScript syntax, corrected sentence.


Corrected / Added:

 The other assignment operators "are usually" shorthand "methods" for performing "standard" operations using the variable (indicated by x above) and value (indicated by y above) and then assigning the result to the variable itself.

Added:

 JavaScript syntax to "Examples" and "Variations" .

Corrected:

The operator table title by adding an "A" and a capital S to JavaScript.

* fix: escaped bitwise OR operator

guide/english/javascript/assignment-operators/index.md

@@ -8,38 +8,37 @@ Assignment operators, as the name suggests, assign (or re-assign) values to a va
 
 ## Syntax
 
-`x = y;` | Description  | Necessity
+`x = y;`| Description  | Necessity
 :---------:|:---------------------:|:---------:  
 `x` | Variable | Required  
 `=` | Assignment operator | Required  
 `y` | Value to assign to variable | Required
 
 ## Examples
-
+```javascript
     let initialVar = 5;   // Variable initialization requires the use of an assignment operator
 
     let newVar = 5;
     newVar = 6;   // Variable values can be modified using an assignment operator
-
+```
 ## Variations
 
-The other assignment operators are a shorthand for performing some operation using the variable (indicated by x above) and value (indicated by y above) and then assigning the result to the variable itself.
+The other assignment operators are usually shorthand methods for performing standard operations using the variable (indicated by x above) and value (indicated by y above) and then assigning the result to the variable itself.
 
 For example, below is the syntax for the addition assignment operator:
-
+```javascript
     x += y;
-
+```
 This is the same as applying the addition operator and reassigning the sum to the original variable (i.e., x), which can be expressed by the following code:
-
+```javascript
     x = x + y;
-
+```
 To illustrate this using actual values, here is another example of using the addition assignment operator:
-
+```javascript
     let myVar = 5;   // value of myVar: 5
     myVar += 7;   // value of myVar: 5 + 7 = 12
-
-## Complete list of Javascript's assignment operators
-
+```
+## A complete list of JavaScript's assignment operators
 Operator | Syntax | Long version  
 ------------------------------- | --------- | -------------  
 Assignment | x = y | x = y  
@@ -54,7 +53,7 @@ Right shift assignment | x >>= y | x = x >> y
 Unsigned right shift assignment | x >>>= y | x = x >>> y  
 Bitwise AND assignment | x &= y | x = x & y  
 Bitwise XOR assignment | x ^= y | x = x ^ y  
-Bitwise OR assignment | x |= y | x = x | y
+Bitwise OR assignment | x \|= y | x = x \| y
 
 ### More Information: