patch 8.0.0521: GtkForm handling is outdated commit https://github.com/vim/vim/commit/99a6e8dd824399332563caa6cacfcda33da1f366 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 29 18:07:40 2017 +0200 patch 8.0.0521: GtkForm handling is outdated Problem: GtkForm handling is outdated. Solution: Get rid of event filter functions. Get rid of GtkForm.width and .height. Eliminate gtk_widget_size_request() calls. (Kazunobu Kuriyama)

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refer to the Farsi help file by typing ":help farsi" in Vim.