Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/controllers/about_controller.rb
- app/controllers/tags_controller.rb
- app/views/about/show.html.haml
- spec/views/about/show.html.haml_spec.rb

spec/models/account_spec.rb

@@ -558,6 +558,11 @@ RSpec.describe Account, type: :model do
       expect(account).to model_have_error_on_field(:username)
     end
 
+    it 'squishes the username before validation' do
+      account = Fabricate(:account, domain: nil, username: " \u3000bob \t \u00a0 \n ")
+      expect(account.username).to eq 'bob'
+    end
+
     context 'when is local' do
       it 'is invalid if the username is not unique in case-insensitive comparison among local accounts' do
         account_1 = Fabricate(:account, username: 'the_doctor')