标题中的日期显示为间隔，没有明显的原因

Question

我正在调整titleFormat来获取Friday, April 21, 2017，但我得到了奇怪的结果：

• dddd呈现Friday
• LL呈现April 21, 2017
• 但将两者放在一起dddd LL，呈现为Friday, April 21, 2017 – April 21, 2017

我错过了什么？

$(function() {
  $("#c1").fullCalendar({
    height: 100,
    defaultView: "agendaDay",
    allDaySlot: false,
    titleFormat: "dddd"
  });
  $("#c2").fullCalendar({
    height: 100,
    defaultView: "agendaDay",
    allDaySlot: false,
    titleFormat: "LL"
  });
  $("#c3").fullCalendar({
    height: 100,
    defaultView: "agendaDay",
    allDaySlot: false,
    titleFormat: "dddd LL"
  });
});

<link href='https://fullcalendar.io/js/fullcalendar-3.3.1/fullcalendar.css' rel='stylesheet' />
<link href='https://fullcalendar.io/js/fullcalendar-3.3.1/fullcalendar.print.css' rel='stylesheet' media='print' />
<script src='//cdnjs.cloudflare.com/ajax/libs/moment.js/2.9.0/moment.min.js'></script>
<script src='//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src='https://fullcalendar.io/js/fullcalendar-3.3.1/fullcalendar.js'></script>

<div id="c1"></div>
<div id="c2"></div>
<div id="c3"></div>

Answer 1

这显然是图书馆中的一个错误（#3645）。