News in 3.99.2
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This is an intermediate version towards GtkSourceView 4.0. GtkSourceView 4.0
will still depend on GTK+ 3, and will be released in March 2017.

* gtk_source_completion_item_new2() has been renamed to
  gtk_source_completion_item_new().
* gtk_source_search_context_forward2() has been renamed to
  gtk_source_search_context_forward().
* gtk_source_search_context_forward_finish2() has been renamed to
  gtk_source_search_context_forward_finish().
* gtk_source_search_context_backward2() has been renamed to
  gtk_source_search_context_backward().
* gtk_source_search_context_backward_finish2() has been renamed to
  gtk_source_search_context_backward_finish().
* gtk_source_search_context_replace2() has been renamed to
  gtk_source_search_context_replace().
* The GtkSourceSearchContext:settings property is now construct-only.