bpo-33855: More edits and new minimal tests for IDLE (GH-7761)


Part 2 of 3.  Continues PR GH-7689, changeset ee5ef30.
Edit and add tests for 18 modules, help_about to replace and run.
(cherry picked from commit ea3dc8029ab6a0f1ee6a8a72f1612dea74892e08)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/pyparse.py b/Lib/idlelib/pyparse.py
index 6196c2b..1eeb915 100644
--- a/Lib/idlelib/pyparse.py
+++ b/Lib/idlelib/pyparse.py
@@ -594,6 +594,6 @@
         return self.stmt_bracketing
 
 
-if __name__ == '__main__':  #pragma: nocover
-    import unittest
-    unittest.main('idlelib.idle_test.test_pyparse', verbosity=2)
+if __name__ == '__main__':
+    from unittest import main
+    main('idlelib.idle_test.test_pyparse', verbosity=2)