Improve guard so it works for no eof new line

syntax/haskell.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'haskell') == -1
+
 " syntax highlighting for haskell
 "
 " Heavily modified version of the haskell syntax
@@ -207,4 +208,5 @@ if get(g:, 'haskell_backpack', 0)
   highlight def link haskellBackpackDependency Include
 endif
 let b:current_syntax = "haskell"
+
 endif