feat: Mirror a string by concatenating it with itself for multiple test cases

🧠 Logic:
- Read the number of test cases `t`.
- For each test case:
  - Read a string `s`.
  - Create a new string `x` by concatenating `s + s`.
  - Print `x`.

📌 Purpose:
Demonstrates string manipulation using concatenation in Java and looping through multiple inputs efficiently.

Signed-off-by: Somesh diwan <[email protected]>

Author: Someshdiwan

Section6StringClassPrinting/src/StringConcationation.java

@@ -1,7 +1,5 @@
-public class StringConcationation
-{
-    public static void main(String[] args)
-    {
+public class StringConcationation {
+    public static void main(String[] args) {
         String s = "5";
         System.out.println(s + 5);
     }