Improve guard so it works for no eof new line

ftplugin/graphql.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'graphql') == -1
+
 " Vim filetype plugin
 " Language: GraphQL
 " Maintainer: Jon Parise <jon@indelible.org>
@@ -17,4 +18,5 @@ setlocal shiftwidth=2
 setlocal expandtab
 
 let b:undo_ftplugin = 'setlocal com< cms< fo< isk< sts< sw< et<'
+
 endif