Change gitignore provider

ftplugin/gitignore.vim

@@ -0,0 +1,20 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'gitignore') == -1
+
+scriptencoding utf-8
+
+" Copyright (c) 2017-2020 Filip Szymański. All rights reserved.
+" Use of this source code is governed by an MIT license that can be
+" found in the LICENSE file.
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal commentstring=#\ %s
+
+let b:undo_ftplugin = 'setlocal commentstring<'
+
+" vim: ts=2 et sw=2
+
+endif