react_bootstrap: clean html

lib/docs/filters/react_bootstrap/clean_html.rb

@@ -2,12 +2,14 @@ module Docs
   class ReactBootstrap
     class CleanHtmlFilter < Filter
       def call
+        @doc = doc.at_css('main')
+
         css('.flex-column.d-flex').remove
         css('header').remove
         css('.bs-example').remove
 
         css('.position-relative pre').each do |node|
-          # node.content = node.content
+          node.content = node.children.map(&:content).join("\n")
           node.remove_attribute('style')
           node['data-language'] = 'jsx'
           node.parent.replace(node)
@@ -16,6 +18,10 @@ module Docs
         css('div, main, pre, h1, h2, h3, h4, h5, h6, a, p').each do |node|
           node.delete 'class'
         end
+        css('h1, h2, h3, h4, h5, h6').each do |node|
+          node.css('a').remove
+          node.content = node.content
+        end
 
         css('#___gatsby, #gatsby-focus-wrapper').each do |node|
           node.delete 'id'