diff --git a/binary-tree-level-order-traversal/WhiteHyun.swift b/binary-tree-level-order-traversal/WhiteHyun.swift
index 641b8a7fc..a71fbc40e 100644
--- a/binary-tree-level-order-traversal/WhiteHyun.swift
+++ b/binary-tree-level-order-traversal/WhiteHyun.swift
@@ -104,4 +104,4 @@ class Solution {
 
     return array
   }
-}
\ No newline at end of file
+}
diff --git a/contains-duplicate/TonyKim9401.java b/contains-duplicate/TonyKim9401.java
index ef9037c49..a2622ab3c 100644
--- a/contains-duplicate/TonyKim9401.java
+++ b/contains-duplicate/TonyKim9401.java
@@ -14,4 +14,4 @@ public boolean containsDuplicate(int[] nums) {
         }
         return false;
     }
-}
\ No newline at end of file
+}
diff --git a/kth-smallest-element-in-a-bst/TonyKim9401.java b/kth-smallest-element-in-a-bst/TonyKim9401.java
index ac759e459..e5785aadf 100644
--- a/kth-smallest-element-in-a-bst/TonyKim9401.java
+++ b/kth-smallest-element-in-a-bst/TonyKim9401.java
@@ -15,4 +15,4 @@ public void visitTreeNode(TreeNode node) {
     }
     // time complexity: O(n), visit all nodes once
     // space complexity: O(1), used an array list
-}
\ No newline at end of file
+}
diff --git a/number-of-1-bits/TonyKim9401.java b/number-of-1-bits/TonyKim9401.java
index 8cf89e55f..da6a663e8 100644
--- a/number-of-1-bits/TonyKim9401.java
+++ b/number-of-1-bits/TonyKim9401.java
@@ -18,4 +18,4 @@ public int hammingWeight(int n) {
         return output;
         */
     }
-}
\ No newline at end of file
+}
diff --git a/number-of-connected-components-in-an-undirected-graph/WhiteHyun.swift b/number-of-connected-components-in-an-undirected-graph/WhiteHyun.swift
index b7009719d..b5f1b3853 100644
--- a/number-of-connected-components-in-an-undirected-graph/WhiteHyun.swift
+++ b/number-of-connected-components-in-an-undirected-graph/WhiteHyun.swift
@@ -37,4 +37,4 @@ final class Solution {
 
     return count
   }
-}
\ No newline at end of file
+}
diff --git a/palindromic-substrings/TonyKim9401.java b/palindromic-substrings/TonyKim9401.java
index a35717567..be4105f5c 100644
--- a/palindromic-substrings/TonyKim9401.java
+++ b/palindromic-substrings/TonyKim9401.java
@@ -49,4 +49,4 @@ public boolean palindromic(String candidate) {
         }
         return true;
     }
-}
\ No newline at end of file
+}
diff --git a/top-k-frequent-elements/TonyKim9401.java b/top-k-frequent-elements/TonyKim9401.java
index 4688be0cf..1bd317489 100644
--- a/top-k-frequent-elements/TonyKim9401.java
+++ b/top-k-frequent-elements/TonyKim9401.java
@@ -29,4 +29,4 @@ public int[] topKFrequent(int[] nums, int k) {
 
         return output;
     }
-}
\ No newline at end of file
+}