Merge branch 'normalise-markup-by-default' into develop

priv/scrubbers/default.ex

@@ -98,7 +98,6 @@ defmodule Pleroma.HTML.Scrubber.Default do
     Meta.allow_tag_with_these_attributes(:img, [
       "width",
       "height",
-      "class",
       "title",
       "alt"
     ])

test/pleroma/web/activity_pub/mrf/normalize_markup_test.exs

@@ -16,6 +16,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.NormalizeMarkupTest do
   this is an image: <img src="http://example.com/image.jpg"><br />
   <script>alert('hacked')</script>
   <div class="wow no classes here">mean</div>
+  <img class="hehe" src="somewhere" />
   """
 
   @expected """
@@ -27,6 +28,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.NormalizeMarkupTest do
   this is an image: <img src="http://example.com/image.jpg"/><br/>
   alert(&#39;hacked&#39;)
   mean
+  <img src="somewhere"/>
   """
 
   test "it filter html tags" do