diff -r 594628261376 -r 47a8513671b8 .hgtags
--- a/.hgtags	Thu Nov 07 19:17:53 2013 +0100
+++ b/.hgtags	Thu Nov 07 19:35:57 2013 +0100
@@ -29,3 +29,4 @@
 c37100233af71af51b225a090317f9cbe05e70a1 Isabelle2013-1-RC1
 782e430e6a83f89b1a9966b28c3d0e0ad883340d Isabelle2013-1-RC2
 fbcaa9f08879dc41d0cd38b6329e70bd602aa2f5 Isabelle2013-1-RC3
+594628261376738e2604627370fcf26e4eab22fa Isabelle2013-1-RC4