bpo-32174: Let .chm document display non-ASCII characters properly (GH-9758)


Let .chm document display non-ASCII characters properly

Escape the `body` part of .chm source file to 7-bit ASCII, to fix visual effect on some MBCS Windows systems.
(cherry picked from commit 6261ae9b01fb8429b779169f8de37ff567c144e8)

Co-authored-by: animalize <animalize@users.noreply.github.com>
3 files changed