init: fix grammar in "templates not found" msg

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/init-db.c

@@ -117,7 +117,7 @@ static void copy_templates(const char *template_dir)
 
 	dir = opendir(template_path.buf);
 	if (!dir) {
-		warning(_("templates not found %s"), template_dir);
+		warning(_("templates not found in %s"), template_dir);
 		goto free_return;
 	}