+ /* Appending formatted strings. */
+ c = tal_strdup(parent, "hi");
+ ok1(tal_append_fmt(&c, "%s %s", "there", "world"));
+ ok1(strcmp(c, "hithere world") == 0);
+ ok1(tal_parent(c) == parent);
+
+ ok1(!tal_append_fmt(&c, take(NULL), "there", "world"));
+ ok1(strcmp(c, "hithere world") == 0);
+