Improve Vanilla import script. (PR #11701)

[techAPJ]

• import groups and group users
• import uploads/attachments
• improved code tag parsing
• improved text formatting
• mark topics as solved

GitHub

[eviltrout]

script/import_scripts/vanilla_body_parser.rb

@@ -24,6 +24,17 @@ def parse
   private
 
   def clean_up(text)
+    # <pre class="CodeBlock">...</pre>
+    text = text.gsub(/\<pre class="CodeBlock"\>(.*?)\<\/pre\>/im) { "\n```\n#{$1}\n```\n" }

I see a lot of changes here that aren’t tested for below. Should we add more tests to cover all these new cases?

[techAPJ]

Agreed, will add more tests in separate PR.