refactor: replace simple switch with if-else

`switch` statements that have only two arms can be better represented as `if` statements.

java/source/com/example/autofixables/IffySwitch.java

@@ -2,35 +2,22 @@ class IffySwitch {
     void thing() {
         int a = 1;
 
-        switch (a) {
-            case 2:
-                System.out.println("first 2");
-            {
-                System.out.println("second 2");
-            }
-                System.out.println("third 2");
-                break;
-            default:
-                System.out.println("default");
+        if (a == 2) {
+            System.out.println("first 2");
+            System.out.println("second 2");
+            System.out.println("third 2");
+        } else {
+            System.out.println("default");
         }
 
-        switch (a) {
-            case 2: {
-                System.out.println("2");
-                break;
-            }
-            default: {
-                System.out.println("default");
-            }
+        if (a == 2) {
+            System.out.println("2");
+        } else {
+            System.out.println("default");
         }
 
-        switch (a) {
-            case 2: {
-                System.out.println("2");
-            }
-            default: {
-                System.out.println("default");
-            }
+        if (a == 2) {
+            System.out.println("2");
         }
 
         switch (a) {