translate bug

example.rb

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  source "https://rubygems.org"
  gem "rails", "~> 6.0.3"
  # gem "rails", "6.1.0.rc1"
  # gem "rails", github: 'rails/rails'
end

require "action_view"
require "active_support"
require "active_support/core_ext/object/blank"
require "minitest/autorun"

ActionView::Base.raise_on_missing_translations = true

module UsersHelper
  def link_to_user
    link_to "hi #{t(nil, default: '-')}", "/ho"
  end
end

class UsersHelperTest < ActionView::TestCase
  test "should not fail" do
    assert_dom_equal %{<a href="/ho">hi -</a>}, link_to_user
    # <a href="/ho">hi &lt;span class=&quot;translation_missing&quot; title=&quot;translation missing: en, raise: true&quot;&gt;En&lt;/span&gt;</a>
  end
end