code: function issue(eat, value, silent) {
    var self = this
    var index
    var start
    var subvalue
    var href
    var now
    var exit
    var node
  
    if (value.charCodeAt(0) === CC_HASH) {
      index = 1
    } else if (value.slice(0, PREFIX.length).toLowerCase() === PREFIX) {
      index = PREFIX.length
    } else {
      return
    }
  
    start = index
    index = issueEnd(value, index)
  
    if (index === -1) {
      return
    }
  
    /* istanbul ignore if - maybe used by plug-ins */
    if (silent) {
      return true
    }
  
    now = eat.now()
    href = gh(self.githubRepo) + 'issues' + C_SLASH + value.slice(start, index)
    subvalue = value.slice(0, index)
  
    now.column += start
  
    exit = self.enterLink()
  
    node = eat(subvalue)({
      type: 'link',
      title: null,
      url: href,
      children: self.tokenizeInline(subvalue, now)
    })
  
    exit()
  
    return node
  }
docs: /* Tokenise an issue.