add missing version identification

diff --git a/Doc/lib/libgetopt.tex b/Doc/lib/libgetopt.tex
index 3d582ebecbe237c909ca7486b87d4334c7fac316..e8b16a31e20fd3b37772fd7a4ba77bdc3157fb0e 100644 (file)
--- a/Doc/lib/libgetopt.tex
+++ b/Doc/lib/libgetopt.tex
@@ -65,6 +65,8 @@ encountered.
 If the first character of the option string is `+', or if the
 environment variable POSIXLY_CORRECT is set, then option processing
 stops as soon as a non-option argument is encountered.
+
+\versionadded{2.3}
 \end{funcdesc}
 
 \begin{excdesc}{GetoptError}