Avoid invalid attribute on local forms generated by `form_with`

Fixes that the following ERB template would result in invalid HTML
output:

    <%= form_with model: Post.new, local: true do |form| %>
    <% end %>

Specifically, the resulting form tag would have a spurious `remote`
attribute:

    <form remote="false" ...>

1 files changed, 10 insertions, 0 deletions

diff --git a/actionview/test/template/form_helper/form_with_test.rb b/actionview/test/template/form_helper/form_with_test.rb
index 4efc93ca08..c078b47e14 100644
--- a/actionview/test/template/form_helper/form_with_test.rb
+++ b/actionview/test/template/form_helper/form_with_test.rb
@@ -116,6 +116,16 @@ class FormWithActsLikeFormTagTest < FormWithTest
 
     assert_dom_equal expected, output_buffer
   end
+
+  def test_form_with_with_block_in_erb_and_local_true
+    output_buffer = render_erb("<%= form_with(url: 'http://www.example.com', local: true) do %>Hello world!<% end %>")
+
+    expected = whole_form("http://www.example.com", local: true) do
+      "Hello world!"
+    end
+
+    assert_dom_equal expected, output_buffer
+  end
 end
 
 class FormWithActsLikeFormForTest < FormWithTest