Am 30.01.2017 um 17:03 schrieb Johannes Schindelin:

Hi René,

On Sat, 28 Jan 2017, René Scharfe wrote:

quoted

diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index 806dd7a885..8ce00480cd 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c

@@ -147,9 +147,7 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
 		tree1 = opt->pending.objects[0].item;
 		tree2 = opt->pending.objects[1].item;
 		if (tree2->flags & UNINTERESTING) {
-			struct object *tmp = tree2;
-			tree2 = tree1;
-			tree1 = tmp;
+			SWAP(tree2, tree1);
 		}

Is there a way to transform away the curly braces for blocks that become
single-line blocks, too?

Interesting question.  I guess this can be done by using a Python script 
(see contrib/coccinelle/strbuf.cocci for an example).  I'll leave this 
as homework for readers interested in Coccinelle, at least for a while. :)

René