Add or update tables specifications links
diff --git a/src/hb-aat-layout-ankr-table.hh b/src/hb-aat-layout-ankr-table.hh
index b3ff925..dc6582b 100644
--- a/src/hb-aat-layout-ankr-table.hh
+++ b/src/hb-aat-layout-ankr-table.hh
@@ -27,16 +27,16 @@
 
 #include "hb-aat-layout-common-private.hh"
 
+/*
+ * ankr -- Anchor Point
+ * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ankr.html
+ */
 #define HB_AAT_TAG_ankr HB_TAG('a','n','k','r')
 
 
 namespace AAT {
 
 
-/*
- * ankr -- Anchor point
- */
-
 struct Anchor
 {
   inline bool sanitize (hb_sanitize_context_t *c) const