gettext: elisp-format

 
 15.3.9 Emacs Lisp Format Strings
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    Emacs Lisp format strings are documented in the Emacs Lisp reference,
 section Formatting Strings,
 <https://www.gnu.org/manual/elisp-manual-21-2.8/html_chapter/elisp_4.html#SEC75>.
 Note that as of version 21, XEmacs supports numbered argument
 specifications in format strings while FSF Emacs doesn’t.