FYI I've just checked this in:
Let "make syntax-check" pass.
* .x-sc_avoid_if_before_free: Exempt ChangeLog.
* tests/statstest.c: Include <config.h>, not "config.h".
diff --git a/.x-sc_avoid_if_before_free b/.x-sc_avoid_if_before_free
index 627dcdf..f83ae7b 100644
--- a/.x-sc_avoid_if_before_free
+++ b/.x-sc_avoid_if_before_free
@@ -2,3 +2,4 @@
^gnulib/lib/printf-parse\.c$
^gnulib/lib/vasnprintf\.c$
^build-aux/find-unnecessary-if-before-free$
+^ChangeLog$
diff --git a/tests/statstest.c b/tests/statstest.c
index 7fa6f46..4c19833 100644
--- a/tests/statstest.c
+++ b/tests/statstest.c
@@ -1,4 +1,4 @@
-#include "config.h"
+#include <config.h>
#include <stdio.h>
#include <stdlib.h>
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