Update README.md

Author: devesh760

README.md

@@ -190,6 +190,8 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
     greet(); // Hello World!
     ```
 
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+
 3. ### Classes
     The classes are introduced as syntactic sugar over existing prototype based inheritance and constructor functions. So this feature doesn't bring new object-oriented inheritance model to JavaScript.
 
@@ -212,7 +214,6 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
       }
     }
     ```
-    **[⬆ Back to Top](#table-of-contents)**
     2. **Class expressions:**
 
     ```js
@@ -256,6 +257,8 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
 
     **Note:** Even though ES6 classes looks similar to classes in other object oriented languages, such as Java, PHP, etc but they do not work exactly the same way.
 
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+
 4. ### Enhanced object literals
 
     Object literals are extended to support setting the prototype at construction, shorthand for foo: foo assignments, defining methods, making super calls, and computing property names with expressions.
@@ -340,6 +343,8 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
       };
     ```
 
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+
 5. ### Template literals
     Prior to ES6, JavaScript developers would need to do ugly string concatenation to creat dynamic strings.
 
@@ -366,6 +371,8 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
     `
     ```
 
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 6. ### Destructuring
 
     Destructuring is a javascript expression for extracting multiple values from data stored in objects(properties of an object) and Arrays.
@@ -396,6 +403,8 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
     3. Parameter definitions
     4. for-of loop
 
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 7. ### Default parameters
 
     Default parameters allow named parameters of a function to be initialized with default values if no value or undefined is passed.
@@ -420,6 +429,8 @@ Each proposal for an ECMAScript feature goes through the following maturity stag
     add(); // 30
     ```
 
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 8. ### Rest parameter
     The rest parameter is used to represent an indefinite number of arguments as an array. The important point here is only the function's last parameter can be a "rest parameter". This feature has been introduced to reduce the boilerplate code that was induced by the arguments.
 
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     console.log(sum(1, 2, 3, 4, 5)); // 15
     ```
 
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+
 9. ### Spread Operator
     Spread Operator allows iterables( arrays / objects / strings ) to be expanded into single arguments/elements.