bug#613: 23.0.60; Unicode display problems

[Chong Yidong]

[Forwarding to the OP, who I accidentally left off the CC list.]

Torsten, could you try what Handa suggested, and let us know the result?
Thanks.

>> > The screen representations of unicode codepoints for left/right
>> > double quotes (x201c, x201d), square root (x221a) and probably many
>> > other are too wide and not anti-aliased like the rest of my glyphs.
>> > According to display-char, they are taken from
>> >
>> > xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1
>> >
>> > In contrast to this, alpha, beta, gamma etc are taken from my main
>> > screen font called
>> >
>> > xft:-unknown-DejaVu Sans 
>> > Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1
>> >
>> > Additionally, the ellipsis (x2026) consists of three dots in
>> > x-height (instead of dots on the baseline).
>
> Emacs defines those characters (U+201C, U+201D, U+221A) as
> `symbol' script and the default fontset defines this font
> for `symbol':
>   (font-spec :registry "iso10646-1" :script 'symbol)
>
> So, somehow, "Kochi Gothic" font is scored higher than
> "Dejavu Sans Mono".  Please try this:
>
> (1) Start Emacs as "% emacs -Q".
> (2) ESC : (setq font-log nil)
> (3) ESC : (insert #x201c)
> (4) M-x font-show-log RET
>
> and show me the result.