@@ -132,7 +132,7 @@ void am_dlist_item_ctor(struct am_dlist_item *item);
132132 * @param list the list
133133 * @param item the item next to this one is returned
134134 *
135- * @return the next item or NULL if \a item is the last one in the list
135+ * @return the next item or NULL, if \a item is the last one in the list
136136 */
137137struct am_dlist_item * am_dlist_next (
138138 const struct am_dlist * list , const struct am_dlist_item * item
@@ -147,7 +147,7 @@ struct am_dlist_item *am_dlist_next(
147147 * @param list the list
148148 * @param item the item previous to this one is returned
149149 *
150- * @return the previous item or NULL if \a item is the first one in the list
150+ * @return the previous item or NULL, if \a item is the first one in the list
151151 */
152152struct am_dlist_item * am_dlist_prev (
153153 const struct am_dlist * list , const struct am_dlist_item * item
@@ -204,7 +204,7 @@ void am_dlist_pop(struct am_dlist_item *item);
204204 *
205205 * @param list the list
206206 *
207- * @return the popped item or NULL if the list was empty
207+ * @return the popped item or NULL, if the list was empty
208208 */
209209struct am_dlist_item * am_dlist_pop_front (struct am_dlist * list );
210210
@@ -213,7 +213,7 @@ struct am_dlist_item *am_dlist_pop_front(struct am_dlist *list);
213213 *
214214 * @param list the list
215215 *
216- * @return the popped item or NULL if the list was empty
216+ * @return the popped item or NULL, if the list was empty
217217 */
218218struct am_dlist_item * am_dlist_pop_back (struct am_dlist * list );
219219
@@ -224,7 +224,7 @@ struct am_dlist_item *am_dlist_pop_back(struct am_dlist *list);
224224 *
225225 * @param list the list
226226 *
227- * @return The pointer to the front (head) item or NULL if the list is empty
227+ * @return The pointer to the front (head) item or NULL, if the list is empty
228228 */
229229struct am_dlist_item * am_dlist_peek_front (struct am_dlist * list );
230230
@@ -235,7 +235,7 @@ struct am_dlist_item *am_dlist_peek_front(struct am_dlist *list);
235235 *
236236 * @param list the list
237237 *
238- * @return the pointer to the back (tail) item or NULL if the list is empty
238+ * @return the pointer to the back (tail) item or NULL, if the list is empty
239239 */
240240struct am_dlist_item * am_dlist_peek_back (struct am_dlist * list );
241241
@@ -300,7 +300,7 @@ void am_dlist_iterator_ctor(
300300 *
301301 * @param it the iterator constructed by am_dlist_iterator_ctor()
302302 *
303- * @return the visited item or NULL if the iteration is over
303+ * @return the visited item or NULL, if the iteration is over
304304 * The item is not popped from the list.
305305 */
306306struct am_dlist_item * am_dlist_iterator_next (struct am_dlist_iterator * it );
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