revision.c: explain what tree_difference does

diff --git a/tree-diff.c b/tree-diff.c
index c8275823d0eb976e95b256f2bce5497f45d5da77..44cde74caf20ded9cd196c4e5d16f4d9ba251a22 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -161,6 +161,8 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
 int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
 {
        while (t1->size | t2->size) {
+               if (opt->quiet && opt->has_changes)
+                       break;
                if (opt->nr_paths && t1->size && !interesting(t1, base, opt)) {
                        update_tree_entry(t1);
                        continue;