fix structure

Author: m-r-davari

README.md

@@ -68,23 +68,24 @@ Includes over 30 useful string functions such as :
 import 'package:common_utilities/common_utilities.dart';
 
 void main() {
-  
-  String mainStr = 'If you want something you have never had you must do something you have never done';
+  String yourStr = 'If you want something you have never had you must do something you have never done';
 
-  String result  = mainStr.stringUtils().subStringBetween('want', 'never');
-  // prints =>  'something you have'
+  String result = yourStr.stringUtils().subStringBetween('want', 'never');
+  // print(result) =>  'something you have'
 
-  List<String> result2  = mainStr.stringUtils().subStringsBetween('you', 'never');
-  // prints =>  ['something you have' , 'must do something you have']
+  List<String> result2 = yourStr.stringUtils().subStringsBetween('you', 'never');
+  // print(result2) =>  ['something you have' , 'must do something you have']
 
-  
-  String result3  = mainStr.stringUtils().subStringAfter('something');
-  // prints =>  'you have never had you must do something you have never done'
+  String result3 = yourStr.stringUtils().subStringAfter('something');
+  // print(result3) =>  'you have never had you must do something you have never done'
 
   bool lastIndex = true; //This is optional & its false by default
-  String result4  = mainStr.stringUtils().subStringAfter('something',lastIndex);
-  // prints =>  'you have never done'
-  
+  String result4 = yourStr.stringUtils().subStringAfter('something', lastIndex);
+  // print(result4) =>  'you have never done'
+
+  String str = CommonUtils.getRandomString(10);
+  // print(str) =>  'btorklcvxw'
+
 }
 ```