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manual: replace an obsolete collation example with a valid one

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In the Spanish language, the digraph "ll" has not been considered a
separate letter since 1994:
  https://www.rae.es/consultas/exclusion-de-ch-y-ll-del-abecedario

Since January 1998 (commit 49891c1062),
glibc's locale data no longer specifies "ch" and "ll" as separate
collation elements.  So, it's better to not use "ll" in an example.

Also, the Czech "ch" is a better example as it collates in a more
surprising place.
This commit is contained in:
Benno Schulenberg 2020-10-12 17:11:47 +02:00 committed by Florian Weimer
parent 7ee881f1f4
commit a5177499e4
1 changed files with 3 additions and 3 deletions
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6
manual/string.texi
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@ -1422,9 +1422,9 @@ This is an obsolete alias for @code{memcmp}, derived from BSD.
In some locales, the conventions for lexicographic ordering differ from
the strict numeric ordering of character codes. For example, in Spanish
most glyphs with diacritical marks such as accents are not considered
distinct letters for the purposes of collation. On the other hand, the
two-character sequence @samp{ll} is treated as a single letter that is
collated immediately after @samp{l}.
distinct letters for the purposes of collation. On the other hand, in
Czech the two-character sequence @samp{ch} is treated as a single letter
that is collated between @samp{h} and @samp{i}.
You can use the functions @code{strcoll} and @code{strxfrm} (declared in
the headers file @file{string.h}) and @code{wcscoll} and @code{wcsxfrm}