use strbuf_addstr() instead of strbuf_addf() with "%s"

Call strbuf_addstr() for adding a simple string to a strbuf instead of
using the heavier strbuf_addf().  This is shorter and documents the
intent more clearly.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sequencer.c

@@ -112,7 +112,7 @@ static void remove_sequencer_state(void)
 {
 	struct strbuf seq_dir = STRBUF_INIT;
 
-	strbuf_addf(&seq_dir, "%s", git_path(SEQ_DIR));
+	strbuf_addstr(&seq_dir, git_path(SEQ_DIR));
 	remove_dir_recursively(&seq_dir, 0);
 	strbuf_release(&seq_dir);
 }