PY-17017 PY-15051 Add a test on handling trailing block comments in formatter

python/testData/formatter/trailingBlockCommentsIndentationPreserved.py

@@ -0,0 +1,10 @@
+class C:
+    def method(self):
+        def foo():
+            def bar():
+                pass
+                # bar
+                    # bar
+                # bar
+          # method
+    # class

python/testData/formatter/trailingBlockCommentsIndentationPreserved_after.py

@@ -0,0 +1,10 @@
+class C:
+    def method(self):
+        def foo():
+            def bar():
+                pass
+                # bar
+                # bar
+                # bar
+        # method
+    # class

python/testSrc/com/jetbrains/python/PyFormatterTest.java

@@ -852,6 +852,11 @@ public class PyFormatterTest extends PyTestCase {
     doTest();
   }
 
+  // PY-15051
+  public void testTrailingBlockCommentsIndentationPreserved() {
+    doTest();
+  }
+
   public void testVariableAnnotations() {
     runWithLanguageLevel(LanguageLevel.PYTHON36, this::doTest);
   }