bpo-28603: Fix a TypeError that caused a shell restart when printing

a traceback that includes an exception that is unhashable.

Patch by Zane Bitter.

bpo-13802: Use non-Latin characters in the Font settings sample.

Even if one selects a font that defines a limited subset of the unicode

Basic Multilingual Plane, tcl/tk will use other fonts that define a

character. The expanded example give users of non-Latin characters

a better idea of what they might see in the shell and editors.

To make room for the expanded sample, frames on the Font tab are

re-arranged. The Font/Tabs help explains a bit about the additions.

Patch by Terry Jan Reedy

bpo-31460: Simplify the API of IDLE's Module Browser.

Passing a widget instead of an flist with a root widget opens the

option of creating a browser frame that is only part of a window.

Passing a full file name instead of pieces assumed to come from a

.py file opens the possibility of browsing python files that do not

end in .py.

bpo-31649: Make _htest and _utest parameters keyword-only.

These are used to adjust code for human and unit tests.

bpo-31459: Rename module browser from Class Browser to Module Browser.

The original module-level class and method browser became a module

browser, with the addition of module-level functions, years ago.

Nested classes and functions were added yesterday. For back-

compatibility, the virtual event <<open-class-browser>>, which

appears on the Keys tab of the Settings dialog, is not changed.

Patch by Cheryl Sabella.

bpo-1612262: Module browser now shows nested classes and functions.

Original patches for code and tests by Guilherme Polo and

Cheryl Sabella, respectively. Revisions by Terry Jan Reedy.

bpo-31500: Tk's default fonts now are scaled on HiDPI displays.

This affects all dialogs. Patch by Serhiy Storchaka.