Improve guard so it works for no eof new line

ftplugin/idris.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'idris') == -1
+
 if bufname('%') == "idris-response"
   finish
 endif
@@ -341,4 +342,5 @@ menu Idris.Proof\ Search\ with\ hints <LocalLeader>p
 
 au BufHidden idris-response call IdrisHideResponseWin()
 au BufEnter idris-response call IdrisShowResponseWin()
+
 endif