Update deepMapKeys.md

snippets/deepMapKeys.md

@@ -4,7 +4,8 @@ Deep maps an object keys.
 
 Creates an object with the same values as the provided object and keys generated by running the provided function for each key.
 
-Use Object.keys(obj) to iterate over the object's keys. Use Array.prototype.reduce() to create a new object with the same values and mapped keys using fn.
+Use `Object.keys(obj)` to iterate over the object's keys. 
+Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.
 
 ```js
 const deepMapKeys = (obj, f) => (
@@ -23,12 +24,9 @@ const deepMapKeys = (obj, f) => (
 ```
 
 ```js
-'use strict';
 const obj = {
   foo:'1',
-   isnull:null,
   nested:{
-      bar:'1',
     child:{
       withArray:[
         {
@@ -37,15 +35,12 @@ const obj = {
       ]
     }
   }
-}
+};
 const upperKeysObj = deepMapKeys(obj, (key) => key.toUpperCase());
 /*
-Formatted JSON Data
 {
   "FOO":"1",
-   "ISNULL":null,
   "NESTED":{
-      "BAR":"1",
     "CHILD":{
       "WITHARRAY":[
         {