bug#39659: 27.0.60; inappropriate han script definition in char-script-table

[Eli Zaretskii]

> From: ynyaaa@gmail.com
> Date: Tue, 18 Feb 2020 22:50:57 +0900
> 
> 'han' script is defined in char-script-table as:
>       2E80-2FDF       han
>       3200-9FFF       han
>       F900-FAFF       han
>       FE30-FE4F       han
>       1F200-1F2FF     han
>       20000-2A6DF     han
>       2A700-2EBEF     han
>       2F800-2FA1F     han
> 
> It is better to set values as:
>       3200-33FF       cjk-misc
>       4DC0-4DFF       cjk-misc
>       FE30-FE4F       cjk-misc
>       1F200-1F2FF     cjk-misc
> 
> If enclosed CJK Ideographs should be 'han' script,
> enclosed Hanguls should be 'hangul' script,
> enclosed Katakana should be 'kana' script,
> and enclosed Numbers should be 'symbol' script.

Please provide some rationale for the differences, just saying
"better" and "should" doesn't explain why you think the changes are
for the good.

CC'ing Handa-san, who I hope will have some comments on this.

Thanks.