in rb/lib/twitter-text/autolink.rb [337:362]
def link_to_hashtag(entity, chars, options = {})
hash = chars[entity[:indices].first]
hashtag = entity[:hashtag]
hashtag = yield(hashtag) if block_given?
hashtag_class = options[:hashtag_class].to_s
if hashtag.match Twitter::TwitterText::Regex::REGEXEN[:rtl_chars]
hashtag_class += ' rtl'
end
href = if options[:hashtag_url_block]
options[:hashtag_url_block].call(hashtag)
else
"#{options[:hashtag_url_base]}#{hashtag}"
end
html_attrs = {
:class => hashtag_class,
:title => "##{hashtag}"
}.merge(options[:html_attrs])
link_to_text_with_symbol(entity, hash, hashtag, href, html_attrs, options)
end