2015-10-12: polish

polish

diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -23,4 +23,5 @@ AS_IF([test "x$python3" = "xno"],
 AM_INIT_AUTOMAKE([gnu])
 AM_MAINTAINER_MODE([enable])
 AC_CONFIG_FILES([Makefile])
+
 AC_OUTPUT