[gnome-tweak-tool] trivial: NEWS formatting

[Jeremy Bicha <jbicha src gnome org>]

commit 93c4cdc57cf835c2d8675609a1aa86ae869ee9d8
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Thu Aug 10 19:12:01 2017 -0400

    trivial: NEWS formatting

 NEWS |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index 7388506..8b0d77c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,5 @@
 3.25.90.1
-========
+=========
 * Fix vertical scrollbar placement (António)
 * Restore redesigned Window Focus Mode listbox (Jeremy)
 
@@ -7,7 +7,7 @@ Contributors:
  Jeremy Bicha, António Fernandes
 
 3.25.90
-======
+=======
 * Remove Power Button setting; this feature is now in gnome-control-center
   3.25.90+ (Jeremy)
 * Don't show HiDPI setting; use gnome-control-center 3.25.90+ instead (Jeremy)