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

Question

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?

Answer 1

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!