Java: Fixed the intention "Invert 'if' condition" in the case of nested 'if' without braces (IDEA-167957)

java/java-tests/testData/codeInsight/invertIfCondition/beforeNestedIf2.java

@@ -0,0 +1,10 @@
+// "Invert 'if' condition" "true"
+class Main {
+    boolean method(boolean a, boolean b) {
+        for (int i = 1; i < 10; i++)
+            if (a)
+                <caret>if (!b)   /* comment 1 */
+                    return true; /* comment 2 */
+        return false;            /* comment 3 */
+    }
+}