generify fix for unchecked assignments (IDEA-152658)

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

@@ -0,0 +1,7 @@
+// "Try to generify 'before2.java'" "true"
+import java.util.ArrayList;
+class Use {
+  void f() {
+   ArrayList<String> s = new ArrayLi<caret>st();
+  }
+}