[retro-gtk] (10 commits) Non-fast-forward update to branch emit-iterated-cleanup

[Adrien Plazas <aplazas src gnome org>]

The branch 'emit-iterated-cleanup' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  51862bd... core: Auto emit 'iterated' on cleanup

Commits added to the branch:

  c38dc04... core: Make it a singleton (*)
  ffe2d9f... core: Document the iterated signal (*)
  d1a691b... core: Improve the runahead property documentation (*)
  388e1d7... core: Typo, quote and apostrophe fix (*)
  9d81cae... core: Fix a precondition in retro_core_override_option_defa (*)
  2a7abec... core: Make keyboard_widget_notify() static (*)
  349e254... core: Make controller_state_changed_cb() static (*)
  b935f18... core: Check controller in retro_core_set_default_controller (*)
  7bb2f2f... core: Check controller in retro_core_set_controller() (*)
  b923180... core: Auto emit 'iterated' on cleanup

(*) This commit already existed in another branch; no separate mail sent