title: What does u'\ufe0f' in an emoji mean? Is it the same if I delete it?
body: <p>I'm writing a python program to judge emojis with a collected emoji Unicode set. During the test, I found that one emoji, take <code>☁</code> as an example, has two Unicode, <code>u'\u2601'</code> and <code>u'\u2601\ufe0f'</code>, what does <code>\ufe0f</code> mean? Is it the same if I delete it?</p>