Fix link_to with block and url_hash

Use link_to with block and url_hash, expect block as name.
But ignore block and use url_hash as name.
3-2-stable passes this test. 4-0-stable and master fail this.

actionview/lib/action_view/helpers/url_helper.rb

@@ -180,7 +180,11 @@ module ActionView
         url = url_for(options)
         html_options['href'] ||= url
 
-        content_tag(:a, name || url, html_options, &block)
+        if block_given?
+          content_tag(:a, capture(&block) || url, html_options)
+        else
+          content_tag(:a, name || url, html_options)
+        end
       end
 
       # Generates a form containing a single button that submits to the URL created

actionview/test/template/url_helper_test.rb

@@ -308,6 +308,13 @@ class UrlHelperTest < ActiveSupport::TestCase
       link_to('/', class: "special") { content_tag(:span, 'Example site') }
   end
 
+  def test_link_tag_using_block_and_hash
+    assert_dom_equal(
+      %{<a href="/"><span>Example site</span></a>},
+      link_to(url_hash) { content_tag(:span, 'Example site') }
+    )
+  end
+
   def test_link_tag_using_block_in_erb
     out = render_erb %{<%= link_to('/') do %>Example site<% end %>}
     assert_equal '<a href="/">Example site</a>', out