The trunk is (nominally) post-alpha.
diff --git a/Doc/texinputs/boilerplate.tex b/Doc/texinputs/boilerplate.tex
index 615d9b5..c872482 100644
--- a/Doc/texinputs/boilerplate.tex
+++ b/Doc/texinputs/boilerplate.tex
@@ -7,5 +7,5 @@
 
 \date{\today}			% XXX update before release!
 \release{2.3}			% software release, not documentation
-\setreleaseinfo{a1}		% empty for final release
+\setreleaseinfo{a1+}		% empty for final release
 \setshortversion{2.3}		% major.minor only for software