Re: format width specifier and locale

[Eli Zaretskii <eliz@gnu.org>]

> From: Joost Kremers <joostkremers@fastmail.fm>
> Date: Wed, 23 Feb 2022 21:02:31 +0100
> 
> While looking into a bug report for a package of mine,[1] it turned out that part
> of the bug is caused by a strange interaction between `format` and the system's
> locale that looks like a bug, but I'd like to ask here first before I submit a
> bug report.
> 
> The following two `format` calls produce identical-length strings when issued in
> an Emacs with `current-language-environment` set to "English" (or, in my case
> "UTF-8"), but when the language environment is set to "Chinese-GBK", the second
> call produces a string that is one character shorter:
> 
>     (format (concat "%50s") "Boutet de Monvel's calculus and groupoids I")
>     (format (concat "%50s") "Boutet de Monvel’s calculus and groupoids I") 
> 
> The difference between the two string is the apostrophe character: in the first
> string, it's an ASCII apostrophe, in the second string it's a RIGHT SINGLE
> QUOTATION MARK.

If you play with the value of text-quoting-style, does that affect the
results in any way?