Bump version numbers.
diff --git a/Doc/texinputs/boilerplate.tex b/Doc/texinputs/boilerplate.tex
index 5580abe..6aa754b 100644
--- a/Doc/texinputs/boilerplate.tex
+++ b/Doc/texinputs/boilerplate.tex
@@ -7,5 +7,5 @@
 
 \date{\today}			% XXX update before final release!
 \release{2.3}			% software release, not documentation
-\setreleaseinfo{b2+}		% empty for final release
+\setreleaseinfo{c1}		% empty for final release
 \setshortversion{2.3}		% major.minor only for software