[Update] Add print (tested)

tests/test.c

@@ -226,7 +226,7 @@ static MunitResult test_tree_print()
   nd = bst_insert(nd,7);
   nd = bst_insert(nd,14);
   nd = bst_insert(nd,13);
-  FILE* f = tmpfile();
+  FILE* f = tmpfile; // Change by stdout for print in console
 
   bst_print(nd,f);
   char buffer[22];