Improved readme

Author: javadev

src/main/java/g3401_3500/s3421_find_students_who_improved/readme.md

@@ -30,29 +30,29 @@ The result format is in the following example.
 
 Scores table:
 
-+------------+----------+-------+------------+
-| student_id | subject  | score | exam_date  |
-+------------+----------+-------+------------+
-| 101        | Math     | 70    | 15-01-2023 |
-| 101        | Math     | 85    | 15-02-2023 |
-| 101        | Physics  | 65    | 15-01-2023 |
-| 101        | Physics  | 60    | 15-02-2023 |
-| 102        | Math     | 80    | 15-01-2023 |
-| 102        | Math     | 85    | 15-02-2023 |
-| 103        | Math     | 90    | 15-01-2023 |
-| 104        | Physics  | 75    | 15-01-2023 |
-| 104        | Physics  | 85    | 15-02-2023 |
-+------------+----------+-------+------------+ 
+    +------------+----------+-------+------------+
+    | student_id | subject  | score | exam_date  |
+    +------------+----------+-------+------------+
+    | 101        | Math     | 70    | 15-01-2023 |
+    | 101        | Math     | 85    | 15-02-2023 |
+    | 101        | Physics  | 65    | 15-01-2023 |
+    | 101        | Physics  | 60    | 15-02-2023 |
+    | 102        | Math     | 80    | 15-01-2023 |
+    | 102        | Math     | 85    | 15-02-2023 |
+    | 103        | Math     | 90    | 15-01-2023 |
+    | 104        | Physics  | 75    | 15-01-2023 |
+    | 104        | Physics  | 85    | 15-02-2023 |
+    +------------+----------+-------+------------+ 
 
 **Output:**
 
-+------------+----------+-------------+--------------+
-| student_id | subject  | first_score | latest_score |
-+------------+----------+-------------+--------------+
-| 101        | Math     | 70          | 85           |
-| 102        | Math     | 80          | 85           |
-| 104        | Physics  | 75          | 85           |
-+------------+----------+-------------+--------------+ 
+    +------------+----------+-------------+--------------+
+    | student_id | subject  | first_score | latest_score |
+    +------------+----------+-------------+--------------+
+    | 101        | Math     | 70          | 85           |
+    | 102        | Math     | 80          | 85           |
+    | 104        | Physics  | 75          | 85           |
+    +------------+----------+-------------+--------------+ 
 
 **Explanation:**