Improved task 19

Author: javadev

src/main/swift/g0001_0100/s0019_remove_nth_node_from_end_of_list/readme.md

@@ -52,32 +52,32 @@ Here's the implementation:
 
 ```swift
 class Solution {
-    func removeNthFromEnd(_ head: ListNode?, _ n: Int) -> ListNode? {        
-        guard ((head?.next) != nil), n > 0 else {return nil}        
+    func removeNthFromEnd(_ head: ListNode?, _ n: Int) -> ListNode? {
+        guard ((head?.next) != nil), n > 0 else {return nil}
         var count = 0
-        var current = head        
+        var current = head
         while let currentNode = current{
             count += 1
             current = currentNode.next
-        }        
+        }
         current = head
-        count = count - n + 1      
-        var prev: ListNode?        
-        while let currentNode = current {            
-            count -= 1            
-            if count == 0 {            
+        count = count - n + 1
+        var prev: ListNode?
+        while let currentNode = current {
+            count -= 1
+            if count == 0 {
                 if prev == nil {
                     current = current?.next
                     return current
                 } else {
                     prev?.next = current?.next
                 }
                 break
-            }            
+            }
             prev = current
-            current = current?.next            
-        }        
-        return head        
+            current = current?.next
+        }
+        return head
     }
 }
 ```