fix: added gradlew script

Author: Cogbonnia

lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java

@@ -13,9 +13,9 @@ public int[] getConcatenation(int[] nums) {
     int n = nums.length;
     int[] ans = new int[2 * n];
 
-    for (int i = 0; i < nums.length; i++){
-        ans[i] = nums[i]; 
-        ans[i + n] = nums[i];
+    for (int i = 0; i < nums.length; i++) {
+      ans[i] = nums[i];
+      ans[i + n] = nums[i];
     }
     return ans;
   }
@@ -29,7 +29,7 @@ public List<Integer> findWordsContaining(String[] words, char x) {
 
     for (int i = 0; i < words.length; i++) {
       if (words[i].indexOf(x) != -1) {
-        indices.add(i); 
+        indices.add(i);
       }
     }
     return indices;