regression after merging inline comment in argument list

[matthargett]

after merging #549

if x(
  --[[ we don't use it ]]
   true,
  90210
  --[[
      color wheel is time-reversed
  ]],
  --[[ frobnikate the widget ]]
  false,
  true
  --[[ spin the tesla coils ]]
) then
  print("hello")
end