Traceback colors are shifted when the line contains wide unicode characters

[HarryLHW]

Bug report

Bug description:

In #28150, the carets' positions are compatible with wide unicode characters. I believe the colors should also be compatible.

CPython versions tested on:

3.13, CPython main branch

Operating systems tested on:

Windows, macOS

Linked PRs

• gh-130273: Fix incorrectly colored error locations when wide unicode characters exists #130277
• gh-130273: Fix traceback color output with unicode characters #142529
• gh-130273: Add pure Python implementation of unicodedata.iter_graphemes() #148218

[shenxianpeng]

Not sure if this borderline case 啊哈 = 1/0####### is necessary. If use Unicode to replace Chinese characters, there is no color shift.