[gtksourceview] vim: add test for filetype

[Christian Hergert <chergert src gnome org>]

commit 1867e71169e8bab61578422eec9ad7bd9f4e931f
Author: Christian Hergert <chergert redhat com>
Date:   Sat Nov 27 18:12:28 2021 -0600

    vim: add test for filetype

 testsuite/test-vim-input.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/testsuite/test-vim-input.c b/testsuite/test-vim-input.c
index 7423556f..c0122f06 100644
--- a/testsuite/test-vim-input.c
+++ b/testsuite/test-vim-input.c
@@ -219,6 +219,7 @@ test_command_bar (void)
        run_test ("", ":set ts=-2\n", "");
        run_test ("", ":set ts=33\n", "");
        run_test ("", ":set tw=100\n", "");
+       run_test ("", ":set ft=c\n", "");
 }
 
 static void