Write #include <error.h>, not #include "error.h".
This is required by Gnulib, although <error.h> is not a POSIX or ISO C
standardized header file.
Reported by Collin Funk <collin.funk1@gmail.com> in
<https://lists.gnu.org/archive/html/bug-gettext/2024-02/msg00011.html>.
* gettext-runtime/src/envsubst.c: Use #include <error.h> instead of
* gettext-runtime/src/gettext.c: Likewise.
* gettext-runtime/src/ngettext.c: Likewise.
* gettext-tools/libgettextpo/gettext-po.c: Likewise.
* gettext-tools/libgrep/m-fgrep.c: Likewise.
* gettext-tools/libgrep/m-regex.c: Likewise.
* gettext-tools/src/file-list.c: Likewise.
* gettext-tools/src/format-scheme.c: Likewise.
* gettext-tools/src/format.h: Likewise.
* gettext-tools/src/hostname.c: Likewise.
* gettext-tools/src/if-error.c: Likewise.
* gettext-tools/src/msgattrib.c: Likewise.
* gettext-tools/src/msgcat.c: Likewise.
* gettext-tools/src/msgcmp.c: Likewise.
* gettext-tools/src/msgcomm.c: Likewise.
* gettext-tools/src/msgconv.c: Likewise.
* gettext-tools/src/msgen.c: Likewise.
* gettext-tools/src/msgexec.c: Likewise.
* gettext-tools/src/msgfilter.c: Likewise.
* gettext-tools/src/msgfmt.c: Likewise.
* gettext-tools/src/msggrep.c: Likewise.
* gettext-tools/src/msginit.c: Likewise.
* gettext-tools/src/msgl-cat.c: Likewise.
* gettext-tools/src/msgl-charset.c: Likewise.
* gettext-tools/src/msgmerge.c: Likewise.
* gettext-tools/src/msgunfmt.c: Likewise.
* gettext-tools/src/msguniq.c: Likewise.
* gettext-tools/src/po-error.c: Likewise.
* gettext-tools/src/po-gram-gen.y: Likewise.
* gettext-tools/src/po-lex.c: Likewise.
* gettext-tools/src/po-lex.h: Likewise.
* gettext-tools/src/po-xerror.c: Likewise.
* gettext-tools/src/read-catalog-abstract.c: Likewise.
* gettext-tools/src/read-csharp.c: Likewise.
* gettext-tools/src/read-desktop.c: Likewise.
* gettext-tools/src/read-java.c: Likewise.
* gettext-tools/src/read-mo.c: Likewise.
* gettext-tools/src/read-properties.c: Likewise.
* gettext-tools/src/read-resources.c: Likewise.
* gettext-tools/src/read-stringtable.c: Likewise.
* gettext-tools/src/read-tcl.c: Likewise.
* gettext-tools/src/recode-sr-latin.c: Likewise.
* gettext-tools/src/urlget.c: Likewise.
* gettext-tools/src/write-csharp.c: Likewise.
* gettext-tools/src/write-desktop.c: Likewise.
* gettext-tools/src/write-java.c: Likewise.
* gettext-tools/src/write-mo.c: Likewise.
* gettext-tools/src/write-properties.c: Likewise.
* gettext-tools/src/write-qt.c: Likewise.
* gettext-tools/src/write-resources.c: Likewise.
* gettext-tools/src/write-tcl.c: Likewise.
* gettext-tools/src/write-xml.c: Likewise.
* gettext-tools/src/x-awk.c: Likewise.
* gettext-tools/src/x-c.c: Likewise.
* gettext-tools/src/x-csharp.c: Likewise.
* gettext-tools/src/x-desktop.c: Likewise.
* gettext-tools/src/x-elisp.c: Likewise.
* gettext-tools/src/x-java.c: Likewise.
* gettext-tools/src/x-javascript.c: Likewise.
* gettext-tools/src/x-librep.c: Likewise.
* gettext-tools/src/x-lisp.c: Likewise.
* gettext-tools/src/x-lua.c: Likewise.
* gettext-tools/src/x-perl.c: Likewise.
* gettext-tools/src/x-php.c: Likewise.
* gettext-tools/src/x-python.c: Likewise.
* gettext-tools/src/x-rst.c: Likewise.
* gettext-tools/src/x-ruby.c: Likewise.
* gettext-tools/src/x-scheme.c: Likewise.
* gettext-tools/src/x-sh.c: Likewise.
* gettext-tools/src/x-smalltalk.c: Likewise.
* gettext-tools/src/x-tcl.c: Likewise.
* gettext-tools/src/x-vala.c: Likewise.
* gettext-tools/src/x-ycp.c: Likewise.
* gettext-tools/src/xg-mixed-string.c: Likewise.
* gettext-tools/src/xgettext.c: Likewise.
* gettext-tools/tests/tstgettext.c: Likewise.
* gettext-tools/tests/tstngettext.c: Likewise.
* gnulib-local/lib/closeout.c: Likewise.
* gnulib-local/lib/xerror.c: Likewise.
* libtextstyle/gnulib-local/lib/fd-ostream.oo.c: Likewise.
* libtextstyle/gnulib-local/lib/html-styled-ostream.oo.c: Likewise.
* libtextstyle/gnulib-local/lib/iconv-ostream.oo.c: Likewise.
* libtextstyle/gnulib-local/lib/memory-ostream.oo.c: Likewise.
* libtextstyle/gnulib-local/lib/term-ostream.oo.c: Likewise.
* gettext-tools/src/its.c: Likewise, and reorganize #includes.
* gettext-tools/src/locating-rule.c: Likewise.
