next try to fix Actions with jekyll-toc

Author: norbertwg

Gemfile

@@ -17,7 +17,7 @@ gem "minima", "~> 2.5"
 group :jekyll_plugins do
   gem "jekyll-feed", "~> 0.12"
   # to create table of content for .md document
-  gem 'jekyll-toc'
+  gem "jekyll-toc"
 end
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem

_plugins/TocFilter.rb

@@ -0,0 +1,17 @@
+module TocFilter
+  def toc(input)
+    output = "<ol class=\"toc\">"
+    input.scan(/<(h2)(?:>|\s+(.*?)>)([^<]*)<\/\1\s*>/mi).each do |entry|
+      id = (entry[1][/^id=(['"])(.*)\1$/, 2] rescue nil)
+      title = entry[2].gsub(/<(\w*).*?>(.*?)<\/\1\s*>/m, '\2').strip
+      if id
+        output << %{<li><a href="##{id}">#{title}</a></li>}
+      else
+        output << %{<li>#{title}</li>}
+      end
+    end
+    output << '</ol>'
+    output
+  end
+end
+Liquid::Template.register_filter(TocFilter)