completion: diamonds; inspection: collapse to diamond

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/explicit2diamond/before2.java

@@ -0,0 +1,7 @@
+// "Replace with <>" "true"
+public class Test {
+  F<F<String>> f = new FF<Str<caret>ing>();
+}
+
+class FF<X> extends F<X>{}
+class F<T> {}