[devhelp/wip/book-list] BookList: more documentation

[Sébastien Wilmet <swilmet src gnome org>]

commit e0d6a0be20d17e60dfe6c4853e0c9a2d18e799a1
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Apr 28 11:47:43 2018 +0200

    BookList: more documentation

 devhelp/dh-book-list.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/devhelp/dh-book-list.c b/devhelp/dh-book-list.c
index 238251e..e154541 100644
--- a/devhelp/dh-book-list.c
+++ b/devhelp/dh-book-list.c
@@ -30,6 +30,9 @@
  * The default implementation maintains an internal #GList when books are added
  * and removed with the #DhBookList::add-book and #DhBookList::remove-book
  * signals, and returns that #GList in dh_book_list_get_books().
+ *
+ * The #DhBookList base class doesn't listen to the #DhBook #DhBook::deleted and
+ * #DhBook::updated signals. It is for example handled by #DhBookListDirectory.
  */
 
 struct _DhBookListPrivate {