[gtksourceview/gnome-3-18] Release 3.18.4

[Sébastien Wilmet <swilmet src gnome org>]

commit dfe66f6882826636dbc2a95b819c11d16b4903e0
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Jun 10 14:58:00 2016 +0200

    Release 3.18.4
    
    Sorry, but stability is more important. It was probably not a good idea
    to backport all those optimization patches. From the optimization
    patches merged on master, there were several other problems (not
    affecting 3.18 I think, but there might be other problems not yet
    discovered).

 NEWS |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 254287c..3b66021 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,8 @@
+News in 3.18.4
+--------------
+* Fix a regression due to an optimization that was backported in 3.18.3
+  There might be other regressions, so it's maybe better to stay at 3.18.2.
+
 News in 3.18.3
 --------------
 * Backport optimizations and bug fixes from 3.20 branch