git-diff -B output fix.

diff --git a/builtin-diff.c b/builtin-diff.c
index cb4216eb8a81ac5263337018272043d673d59977..a090e298a55ef110a6fdd0e0dde54ea744a52f76 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -23,7 +23,7 @@ struct blobinfo {
 };
 
 static const char builtin_diff_usage[] =
-"diff <options> <rev>{0,2} -- <path>*";
+"git-diff <options> <rev>{0,2} -- <path>*";
 
 static int builtin_diff_files(struct rev_info *revs,
                              int argc, const char **argv)
@@ -253,7 +253,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        argc = setup_revisions(argc, argv, &rev, NULL);
        if (!rev.diffopt.output_format) {
                rev.diffopt.output_format = DIFF_FORMAT_PATCH;
-               diff_setup_done(&rev.diffopt);
+               if (diff_setup_done(&rev.diffopt) < 0)
+                       die("diff_setup_done failed");
        }
 
        /* Do we have --cached and not have a pending object, then
@@ -348,6 +349,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                 * A and B.  We have ent[0] == merge-base, ent[1] == A,
                 * and ent[2] == B.  Show diff between the base and B.
                 */
+               ent[1] = ent[2];
                return builtin_diff_tree(&rev, argc, argv, ent);
        }
        else