fix: reordering and fix of small errors

02. Linked lists/2.2. return_kth_to_last.md

@@ -10,7 +10,7 @@ class Node {
     int data;
 
     public Node(int d){
-        data = d;
+        this.data = d;
     }
 
     void appendToTail(int d){

08. Recursion/8.3. magic_index.md

@@ -1,6 +1,6 @@
 # 8.3. Magic index
 
-## Given an array of **distinct** integers, find a magix index, ifo ne exists. A magic index in an array A is an index such that A[i] = 1
+## Given an array of **distinct** integers, find a magix index, if one exists. A magic index in an array A is an index such that A[i] = 1
 
 ## First idea
 

16. Moderate problems/16.17. max_subarray.md

@@ -1,8 +1,8 @@
 # 16.8. Contiguous sequence or Maximum subarray problem
 
-## Given an array of integers, both negative and positive, find the contiguous sequence with the largest sum. Return the sum
+> Given an array of integers, both negative and positive, find the contiguous sequence with the largest sum. Return the sum
 
-> example:
+Example:
 
 ```bash
 nums = [2, -8, 3, -2, 4, -10]