diff-highlight: use test_tick in graph test

diff --git a/contrib/diff-highlight/Makefile b/contrib/diff-highlight/Makefile
index fbf5c582496eece56b29a91a2f3085716f4b0e9f..f2be7cc92437191219d16ddf1536883da23541c0 100644 (file)
--- a/contrib/diff-highlight/Makefile
+++ b/contrib/diff-highlight/Makefile
@@ -17,4 +17,7 @@ shebang.perl: FORCE
 test: all
        $(MAKE) -C t
 
+clean:
+       $(RM) diff-highlight
+
 .PHONY: FORCE