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.

Lib/idlelib/idle_test/test_debugobj_r.py

@@ -0,0 +1,22 @@
+"Test debugobj_r, coverage 56%."
+
+from idlelib import debugobj_r
+import unittest
+
+
+class WrappedObjectTreeItemTest(unittest.TestCase):
+
+    def test_getattr(self):
+        ti = debugobj_r.WrappedObjectTreeItem(list)
+        self.assertEqual(ti.append, list.append)
+
+class StubObjectTreeItemTest(unittest.TestCase):
+
+    def test_init(self):
+        ti = debugobj_r.StubObjectTreeItem('socket', 1111)
+        self.assertEqual(ti.sockio, 'socket')
+        self.assertEqual(ti.oid, 1111)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)