format-patch: update append_signoff prototype

diff --git a/sequencer.c b/sequencer.c
index 965b954baf65dc81e1e219ef3a91234b76ab5c73..53ee49a9b0b02a687e3b56e85d96794d9f1b31ce 100644 (file)
--- a/sequencer.c
+++ b/sequencer.c
@@ -1123,8 +1123,19 @@ void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag)
        else
                has_footer = has_conforming_footer(msgbuf, &sob, ignore_footer);
 
-       if (!has_footer)
-               strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, "\n", 1);
+       if (!has_footer) {
+               const char *append_newlines = NULL;
+               size_t len = msgbuf->len - ignore_footer;
+
+               if (len && msgbuf->buf[len - 1] != '\n')
+                       append_newlines = "\n\n";
+               else if (len > 1 && msgbuf->buf[len - 2] != '\n')
+                       append_newlines = "\n";
+
+               if (append_newlines)
+                       strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0,
+                               append_newlines, strlen(append_newlines));
+       }
 
        if (has_footer != 3 && (!no_dup_sob || has_footer != 2))
                strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0,