StreamToLoopInspection#ensureCodeBlock refactored to use PsiTreeUtil.mark/releaseMark (IDEA-CR-16755)

RefactoringUtil#expandExpressionLambdaToCodeBlock reverted (now changes there unnecessary)
void single-expression lambda support

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterInVoidLambda.java

@@ -0,0 +1,20 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Objects;
+import java.util.stream.Stream;
+
+public class Main {
+  public void test(String... list) {
+    Runnable s = () -> {
+        for (String s1 : list) {
+            if (Objects.nonNull(s1)) {
+                System.out.println(s1);
+            }
+        }
+    };
+  }
+
+  public static void main(String[] args) {
+    new Main().test("a", "bbb", null, "cc", "dd", "eedasfasdfs");
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeInVoidLambda.java

@@ -0,0 +1,15 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Objects;
+import java.util.stream.Stream;
+
+public class Main {
+  public void test(String... list) {
+    Runnable s = () -> Stream.of(list)
+                               .filter(Objects::nonNull).for<caret>Each(System.out::println);
+  }
+
+  public static void main(String[] args) {
+    new Main().test("a", "bbb", null, "cc", "dd", "eedasfasdfs");
+  }
+}