small cleanup

parallel_hashmap/phmap.h

@@ -1293,13 +1293,13 @@ public:
     void insert(InputIt first, InputIt last) {
         this->reserve(this->size() + (last - first));
         for (; first != last; ++first) 
-            insert(*first);
+            emplace(*first);
     }
 
     template <class InputIt, typename phmap::enable_if_t<!has_difference_operator<InputIt>::value, int> = 0>
     void insert(InputIt first, InputIt last) {
         for (; first != last; ++first) 
-            insert(*first);
+            emplace(*first);
     }
 
     template <class T, RequiresNotInit<T> = 0, RequiresInsertable<const T&> = 0>