convert anonymous to inner: collapse diamonds (IDEA-87265)

java/java-tests/testData/refactoring/anonymousToInner/canBeStatic_after.java

@@ -1,6 +1,6 @@
 public class Foo {
     public<T> void foo() {
-        Predicate<T> predicate = new MyPredicate<T>();
+        Predicate<T> predicate = new MyPredicate<>();
     }
 
     private interface Predicate<K> {

java/java-tests/testData/refactoring/anonymousToInner/collapseDiamonds.java

@@ -0,0 +1,14 @@
+public class Foo {
+    public<T> void foo() {
+        Predicate<T> predicate = ne<caret>w Predicate<T>() {
+            @Override
+            public boolean test(T t) {
+                return false;
+            }
+        };
+    }
+
+    private interface Predicate<K> {
+        boolean test(K t);
+    }
+}

java/java-tests/testData/refactoring/anonymousToInner/collapseDiamonds_after.java

@@ -0,0 +1,16 @@
+public class Foo {
+    public<T> void foo() {
+        Predicate<T> predicate = new MyPredicate<>();
+    }
+
+    private interface Predicate<K> {
+        boolean test(K t);
+    }
+
+    private static class MyPredicate<T> implements Predicate<T> {
+        @Override
+        public boolean test(T t) {
+            return false;
+        }
+    }
+}

java/java-tests/testData/refactoring/anonymousToInner/genericTypeParameters_after.java

@@ -2,7 +2,7 @@ import java.util.*;
 
 class A<K, V> {
     public Iterator<Map.Entry<K, V>> iterator(long revision) {
-        return new MyIterator<K, V>();
+        return new MyIterator<>();
     }
 
     private static class MyIterator<K, V> implements Iterator<Map.Entry<K, V>> {