Index: kicad
===================================================================
--- kicad	(revision 24248)
+++ kicad	(revision 24249)
@@ -38,4 +38,5 @@
 	sed -i "s/uid = .*/ uid = vs82JCQZ2ImwqgJSkxAAAAAK/" out/$n2
 	diff -u ref/$n2 out/$n2
 	diff -u ref/$w out/$w
-done
+done | tee a.diff
+