Minor grammar fixes for git-diff-index.txt

diff --git a/cache-tree.c b/cache-tree.c
index d388848dd25db917e9bac5a8fd95cd89d214f5d8..a80326289dbea2c08acce577cf8eef26a0cfba68 100644 (file)
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -2,7 +2,9 @@
 #include "tree.h"
 #include "cache-tree.h"
 
+#ifndef DEBUG
 #define DEBUG 0
+#endif
 
 struct cache_tree *cache_tree(void)
 {