'Test that appended escapes are only in the current instance.'

def testAppend(self):

    md = markdown.Markdown()
    md.ESCAPED_CHARS.append(u'|')
    self.assertEqual((u'|' in md.ESCAPED_CHARS), True)
    md2 = markdown.Markdown()
    self.assertEqual((u'|' not in md2.ESCAPED_CHARS), True)
