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 ee5ef30)

# Conflicts fixed:
#	Lib/idlelib/idle_test/test_calltip.py

Improve consistency and appearance. Module idlelib.calltips is now calltip.
Class idlelib.calltip_w.CallTip is now Calltip..
(cherry picked from commit 06e2029)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>