Fix typo.
diff --git a/.hgtags b/.hgtags
index c540871..aab517d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -79,3 +79,4 @@
 0000000000000000000000000000000000000000 v2.5.2
 1d508bbbdb49a2b11629ee186a63928291b08694 v2.5.2
 e4afcb8b34bdba13e337bf61bd7866289521c6e9 v2.5.2
+e908d731087a2a84f40a2741c4a6bc0c76919f6e v2.5.2