Merge branch 'feature/calculator'

Author: mustafiz-07

src/main/java/com/thealgorithms/calculator.java

@@ -1,9 +1,9 @@
 package com.thealgorithms;
 
 public class calculator {
-public int add(int a, int b) {
-    return a + b + 1;
-}
+     public int add(int a, int b) {
+        return a + b+1;
+    }
 
     public int subtract(int a, int b) {
         return a - b;