fix: insert newline

Author: donghyeon95

longest-substring-without-repeating-characters/donghyeon95.java

@@ -31,4 +31,7 @@ public int lengthOfLongestSubstring(String s) {
 
 		return Math.max(nowString.length(), result);
 	}
-}
+}
+
+
+

number-of-islands/donghyeon95.java

@@ -31,4 +31,6 @@ public void dfs(int y, int x, char[][] grid) {
 			dfs(newY, newX, grid);
 		}
 	}
-}
+}
+
+

reverse-linked-list/donghyeon95.java

@@ -25,4 +25,6 @@ public ListNode reverseList(ListNode head) {
 
 		return result;
 	}
-}
+}
+
+

unique-paths/donghyeon95.java

@@ -17,4 +17,5 @@ public int uniquePaths(int m, int n) {
 
 		return dp[m - 1][n - 1];
 	}
-}
+}
+