Improve guard so it works for no eof new line

ftplugin/elm.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'elm') == -1
+
 " plugin for Elm (http://elm-lang.org/)
 
 if exists('b:did_ftplugin')
@@ -108,4 +109,5 @@ let &l:path =
 setlocal includeexpr=GetElmFilename(v:fname)
 setlocal include=^\\s*import\\s\\+
 setlocal suffixesadd=.elm
+
 endif