user-manual: reset to ORIG_HEAD not HEAD to undo merge

diff --git a/builtin-diff.c b/builtin-diff.c
index 40e5c96f30e3d638c09b276805158bdba3ddde58..c387ebb16c6bd353a84abd9454892eeab309ef1e 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -69,7 +69,7 @@ static void stuff_change(struct diff_options *opt,
        struct diff_filespec *one, *two;
 
        if (!is_null_sha1(old_sha1) && !is_null_sha1(new_sha1) &&
-           !memcmp(old_sha1, new_sha1, 20))
+           !hashcmp(old_sha1, new_sha1))
                return;
 
        if (opt->reverse_diff) {
@@ -192,7 +192,8 @@ static int builtin_diff_combined(struct rev_info *revs,
        parent = xmalloc(ents * sizeof(*parent));
        /* Again, the revs are all reverse */
        for (i = 0; i < ents; i++)
-               memcpy(parent + i, ent[ents - 1 - i].item->sha1, 20);
+               hashcpy((unsigned char *)(parent + i),
+                       ent[ents - 1 - i].item->sha1);
        diff_tree_combined(parent[0], parent + 1, ents - 1,
                           revs->dense_combined_merges, revs);
        return 0;
@@ -290,7 +291,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                if (obj->type == OBJ_BLOB) {
                        if (2 <= blobs)
                                die("more than two blobs given: '%s'", name);
-                       memcpy(blob[blobs].sha1, obj->sha1, 20);
+                       hashcpy(blob[blobs].sha1, obj->sha1);
                        blob[blobs].name = name;
                        blobs++;
                        continue;