[gtksourceview] (3 commits) Non-fast-forward update to branch wip/chergert/snippets

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/snippets' 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:

  a6c9ae1... snippet: implement basic snippet engine
  f5d47e2... snippets: (TEST ONLY) expand current word into snippet

Commits added to the branch:

  fe7f148... use g_object_notify_by_pspec() and EXPLICIT_NOTIFY (*)
  f98314c... snippet: implement basic snippet engine
  08bae00... snippets: (TEST ONLY) expand current word into snippet

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