[gtksourceview] (6 commits) Non-fast-forward update to branch wip/various-stuff

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/various-stuff' 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:

  6877b93... Completion: weak reference to the view
  5d7aaa2... Revert "Prevent construction of completion after dispose ha
  c2ce86e... Completion: support changing the view's buffer
  660d88d... Completion: override constructed
  5e26339... Completion: move the code so the prototype is not needed
  341fd10... Completion: autosize tree view columns when widget is visib

Commits added to the branch:

  f111ea4... Completion: autosize tree view columns when widget is visib (*)
  041e1a9... Completion: weak reference to the view
  58f500c... Revert "Prevent construction of completion after dispose ha
  5765364... Completion: support changing the view's buffer
  3d5a9f4... Completion: override constructed
  0e563c5... Completion: move the code so the prototype is not needed

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