Integrate new engine, correct old specs

corrects edge cases with

- full quotes
- [url] with nested tags
- engine overrides
- onebox applying to non http srcs

lib/pretty_text.rb

@@ -175,12 +175,14 @@ module PrettyText
 
       buffer << "__textOptions = __buildOptions(__optInput);\n"
 
-      # Be careful disabling sanitization. We allow for custom emails
-      if opts[:sanitize] == false
-        buffer << ('__textOptions.sanitize = false;')
-      end
 
       buffer << ("__pt = new __PrettyText(__textOptions);")
+
+      # Be careful disabling sanitization. We allow for custom emails
+      if opts[:sanitize] == false
+        buffer << ('__pt.disableSanitizer();')
+      end
+
       opts = context.eval(buffer)
 
       DiscourseEvent.trigger(:markdown_context, context)