[iter] Rename hb_is_[sorted_]iterator() -> hb_is_[sorted_]iterator_of()

src/hb-open-type.hh

diff --git a/src/hb-open-type.hh b/src/hb-open-type.hh
index 70c1654..4dc1e2c 100644
--- a/src/hb-open-type.hh
+++ b/src/hb-open-type.hh
@@ -554,7 +554,7 @@
     return_trace (true);
   }
   template <typename Iterator>
-    hb_enable_if_t (hb_is_iterator (Iterator, const Type),
+    hb_enable_if_t (hb_is_iterator_of (Iterator, const Type),
   bool) serialize (hb_serialize_context_t *c,
 		   Iterator items)
   {
@@ -822,7 +822,7 @@
     return_trace (ret);
   }
   template <typename Iterator>
-    hb_enable_if_t (hb_is_sorted_iterator (Iterator, const Type),
+    hb_enable_if_t (hb_is_sorted_iterator_of (Iterator, const Type),
   bool) serialize (hb_serialize_context_t *c,
 		   Iterator items)
   {