match-trees: use hashcpy to splice trees

diff --git a/builtin/log.c b/builtin/log.c
index 5ac18e28486b61b91239d859c445bc620c51c5ad..e8e51068bd903c01e12207637d59d80ea940bf2d 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1094,9 +1094,18 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
        }
 
        if (rev->rdiff1) {
+               /*
+                * Pass minimum required diff-options to range-diff; others
+                * can be added later if deemed desirable.
+                */
+               struct diff_options opts;
+               diff_setup(&opts);
+               opts.file = rev->diffopt.file;
+               opts.use_color = rev->diffopt.use_color;
+               diff_setup_done(&opts);
                fprintf_ln(rev->diffopt.file, "%s", rev->rdiff_title);
                show_range_diff(rev->rdiff1, rev->rdiff2,
-                               rev->creation_factor, 1, NULL);
+                               rev->creation_factor, 1, &opts);
        }
 }