3.89.3: (unstable)
Distro packagers should probably not package this yet.

Gtk:
* Grid: attach(): Add default values.
  (Kjell Ahlstedt)
* TextIter:
  - TextIter: Make a real const_iterator
  (Kjell Ahlstedt) Bug #142126
  - forward/backward_find_char(): Take a sigc::slot
  instead of a function pointer.
  (Kjell Ahlstedt)

Documentation:
* Demos: Remove obsolete text from the TextView demo
  (Kjell Ahlstedt)