get("#185")

function lineAbove()
  return lines[curY] or ''
end

function userFunction(line)
  return "Hello.\n"
end

function extensions(hook)
  if hook == 'processEvents1' then
    if inputEvents then
      for _, e in ipairs(inputEvents) do
        if e[1] == 'keyTyped' and e.keyChar == '\n' and userFunction then
          local s = userFunction(lineAbove())
          if s ~= nil then insertText(s) end
        end
      end
    end
  end
end