Problem when rendering blocks

[stephannv]

The yield_content was removed here in favor of render. But using render with blocks is breaking with ArgumentError: 'nil' is not an ActiveModel-compatible object. It must implement #to_partial_path..

To reproduce the error:

class Hello < Phlex::HTML
  def view_template(&)
    plain "Hello "
    render(&)
  end
end

Hello.new.call { "World" }

# or rendering inside another component

class Page < Phlex::HTML
  def view_template
    render Hello.new do
      span { "World" }
    end
  end
end

I will open a PR with a failing test.