bpo-33855: Minimally test all IDLE modules. (GH-7689)


Create a template for minimally testing a tkinter-using module by importing it and instantiating its class(es).  Add a test file for all non-startup IDLE modules.  Edit existing files and update coverage.  This is part 1 of 3, covering the 21 autocomplete to help modules and touching 33 idlelib files.
(cherry picked from commit ee5ef309c7e2daef1248730145408f700732c42e)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/debugobj_r.py b/Lib/idlelib/debugobj_r.py
index 8031aae..75e75eb 100644
--- a/Lib/idlelib/debugobj_r.py
+++ b/Lib/idlelib/debugobj_r.py
@@ -34,3 +34,8 @@
     def _GetSubList(self):
         sub_list = self.sockio.remotecall(self.oid, "_GetSubList", (), {})
         return [StubObjectTreeItem(self.sockio, oid) for oid in sub_list]
+
+
+if __name__ == '__main__':
+    from unittest import main
+    main('idlelib.idle_test.test_debugobj_r', verbosity=2)