The main information in the branch-diff view comes from the list of
matching and non-matching commits, the diffs are additional information.
Indenting them helps with the reading flow.

Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
 builtin/branch-diff.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/builtin/branch-diff.c b/builtin/branch-diff.c
index 9dc581087bb..a4e602deb5d 100644
--- a/builtin/branch-diff.c
+++ b/builtin/branch-diff.c
@@ -272,6 +272,11 @@ static const char *short_oid(struct patch_util *util)
        return find_unique_abbrev(&util->oid, DEFAULT_ABBREV);
 }
 
+static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data)
+{
+       return data;
+}
+
 static struct diff_filespec *get_filespec(const char *name, const char *p)
 {
        struct diff_filespec *spec = alloc_filespec(name);
@@ -350,6 +355,7 @@ static void output(struct string_list *a, struct 
string_list *b,
 int cmd_branch_diff(int argc, const char **argv, const char *prefix)
 {
        struct diff_options diffopt = { 0 };
+       struct strbuf four_spaces = STRBUF_INIT;
        double creation_weight = 0.6;
        struct option options[] = {
                OPT_SET_INT(0, "no-patches", &diffopt.output_format,
@@ -368,6 +374,9 @@ int cmd_branch_diff(int argc, const char **argv, const char 
*prefix)
 
        diff_setup(&diffopt);
        diffopt.output_format = DIFF_FORMAT_PATCH;
+       diffopt.output_prefix = output_prefix_cb;
+       strbuf_addstr(&four_spaces, "    ");
+       diffopt.output_prefix_data = &four_spaces;
 
        argc = parse_options(argc, argv, NULL, options,
                        builtin_branch_diff_usage, PARSE_OPT_KEEP_UNKNOWN);
-- 
2.17.0.395.g6a618d6010f.dirty


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