make commit_tree a library function

diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c
index a50ac2256cdbacd76ed44a50804212be07f949db..ce2ef6bede40fde8823336bc85762bd3e7cd4760 100644 (file)
--- a/builtin/mailinfo.c
+++ b/builtin/mailinfo.c
@@ -779,8 +779,7 @@ static int handle_commit_msg(struct strbuf *line)
                return 0;
 
        if (still_looking) {
-               strbuf_ltrim(line);
-               if (!line->len)
+               if (!line->len || (line->len == 1 && line->buf[0] == '\n'))
                        return 0;
        }