bug#41100: emacs-27 7081c1d: Fix typos in the Emacs user manual

[Sebastian Urban]

> The preferred Unicode spelling these days is “Baháʼí” (with U+02BC 
MODIFIED
> LETTER APOSTROPHE). However, although Texinfo can handle that 
character and puts
> it into info files, the character doesn’t survive transliteration 
to TeX (it
> gets lost). I don't know whether this is a bug in Texinfo or in 
TeX, but anyway
> we need to work around it if we're going to use the correct spelling.

AND from patch:
> +@iftex
> +@c TeX mishandles ʼ (U+02BC MODIFIER LETTER APOSTROPHE), so 
approximate
> +@c it with ', which TeX renders as a right single quotation mark.
> +@set Bahai Bahá'í
> +@end iftex

When I put this "modified letter apostrophe" alone in calendar.texi
and build PDF, in emacs.log the following line appear: "Unicode char
@u8:ʼ not defined for Texinfo", so perhaps it is Texinfo that
"mishandles" the apostrophe, not TeX.


S. U.