doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/dm/util.h b/include/dm/util.h
index 17baf55..4428f04 100644
--- a/include/dm/util.h
+++ b/include/dm/util.h
@@ -20,7 +20,7 @@
  * list_count_items() - Count number of items in a list
  *
  * @param head:		Head of list
- * @return number of items, or 0 if empty
+ * Return: number of items, or 0 if empty
  */
 int list_count_items(struct list_head *head);