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>

1 files changed, 6 insertions, 10 deletions

diff --git a/Lib/idlelib/idle_test/test_browser.py b/Lib/idlelib/idle_test/test_browser.py
index 34eb332..905dc1f 100644
--- a/Lib/idlelib/idle_test/test_browser.py
+++ b/Lib/idlelib/idle_test/test_browser.py
@@ -1,20 +1,16 @@
-""" Test idlelib.browser.
+"Test browser, coverage 90%."
 
-Coverage: 88%
-(Higher, because should exclude 3 lines that .coveragerc won't exclude.)
-"""
+from idlelib import browser
+from test.support import requires
+import unittest
+from unittest import mock
+from idlelib.idle_test.mock_idle import Func
 
 from collections import deque
 import os.path
 import pyclbr
 from tkinter import Tk
 
-from test.support import requires
-import unittest
-from unittest import mock
-from idlelib.idle_test.mock_idle import Func
-
-from idlelib import browser
 from idlelib import filelist
 from idlelib.tree import TreeNode