diff -r 2f1b2854927a -r dfee1c403242 .hgtags
--- a/.hgtags	Wed May 31 14:58:38 2017 +0200
+++ b/.hgtags	Fri Nov 17 05:49:54 2017 +0100
@@ -1,1 +1,2 @@
 d61d51765a02aecd2b1daea286a80ca5458bc948 Isabelle2014/Isac
+2f1b2854927a67d0f66d5ab8f17f40933e30f5a1 Isac2015