[gnome-builder] style: fix typo

[Christian Hergert <chergert src gnome org>]

commit 6bc1bb97a8aacea1d6727ef3af1a13f23e62f596
Author: Christian Hergert <christian hergert me>
Date:   Fri Mar 27 03:22:39 2015 -0700

    style: fix typo

 data/style-schemes/builder-dark.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/style-schemes/builder-dark.xml b/data/style-schemes/builder-dark.xml
index 0f110d2..93556ee 100644
--- a/data/style-schemes/builder-dark.xml
+++ b/data/style-schemes/builder-dark.xml
@@ -131,7 +131,7 @@
 
   <style name="diff:added-line"             foreground="chameleon2"/>
   <style name="diff:removed-line"           foreground="plum1"/>
-  <style name="diff:changed-line"           foreground="buffer3"/>
+  <style name="diff:changed-line"           foreground="butter3"/>
   <style name="diff:diff-file"              foreground="chameleon1" bold="true"/>
   <style name="diff:location"               foreground="chameleon1"/>
   <style name="diff:special-case"           foreground="white" bold="true"/>