use skip_prefix to avoid magic numbers

diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index 3906eda87712ea099e0e5876fff1fe28fc5716be..3c19241554da225423fb1f10eaaebb56db7e73fd 100644 (file)
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -297,8 +297,8 @@ static void credit_people(struct strbuf *out,
        if (!them->nr ||
            (them->nr == 1 &&
             me &&
-            (me = skip_prefix(me, them->items->string)) != NULL &&
-            skip_prefix(me, " <")))
+            skip_prefix(me, them->items->string, &me) &&
+            starts_with(me, " <")))
                return;
        strbuf_addf(out, "\n%c %s ", comment_line_char, label);
        add_people_count(out, them);