* @set: the set.
* @member: the string to search for.
*
- * Returns the member, or NULL if it isn't in the set.
+ * Returns the member, or NULL if it isn't in the set (and sets errno
+ * = ENOENT).
*
* Example:
* if (strset_test(&set, "hello"))
* @set: the set.
* @member: the string to remove from the set.
*
- * This returns the string which was passed to strset_set(), or NULL.
+ * This returns the string which was passed to strset_set(), or NULL if
+ * the string was not in the map (in which case it sets errno = ENOENT).
+ *
* This means that if you allocated a string (eg. using strdup()), you can
* free it here.
*