syntax error, unexpected ')', expecting '='

I'm writing an extension for Redcarpet for a Jekyll-powered website. I want to use {x|y} as a tag in markdown that evaluates to the HTML <ruby> tag (and its associates). I wrote this class as per Jekyll's guide, Redcarpet's guide, and this guide on how to do so:

class Jekyll::Converters::Markdown::HotelDown < Redcarpet::Render::HTML
    def preprocess(doc)
        s = "<ruby><rb>\\1</rb><rp>(</rp><rt>\\2</rt><rp>)</rp></ruby>"
        doc.gs­ub!(/\[([\­s\S]+)\|([­\s\S]+)\]/­, s)
        doc
    end
end

But, I seem to be getting a couple errors when I run bundle exec jekyll serve:

Configuration file: C:/Users/Alex/OneDrive/codes/hotelc.me/hotelc.me/_config.yml
plugin_manager.rb:58:in `require': HotelDown.rb:4: syntax error, unexpected tIDENTIFIER, expecting ')' (SyntaxError)
            doc.gs-ub!(/\[([\-s\S]+)\|([-\s\S]+)\]/-, s)
                                                        ^
HotelDown.rb:4: syntax error, unexpected ')', expecting '='
            doc.gs-ub!(/\[([\-s\S]+)\|([-\s\S]+)\]/-, s)
                                                            ^

It seems there's something wrong with my syntax (an extra space, missing parentheses, or something like that). Is there something I've missed?

Your code has some special characters which is causing this error:

syntax error, unexpected ')', expecting '='
            doc.gs-ub!(/\[([\-s\S]+)\|([-\s\S]+)\]/-, s)

Replace your current code with this piece of code:

class Jekyll::Converters::Markdown::HotelDown < Redcarpet::Render::HTML
  #Overriding the preprocess() function
  def preprocess(doc)
    s = "<ruby><rb>\\1</rb><rp>(</rp><rt>\\2</rt><rp>)</rp></ruby>"
    doc.gsub!(/\[([\s\S]+)\|([\s\S]+)\]/, s)
    doc
  end
end

markdown = Redcarpet::Markdown.new(HotelDown)

and it should work!