How to embed icons in button_to helper in Rails

Environment

• macOS Mojave 10.14.1
• Rails 5.1.6
• ruby 2.5.0
• Font Awesome

What I want to do: I want to embed an icon in a button_to helper as shown below.

It’s easy to do using a block.

<%= button_to new_user_registration_path, :class => 'ui button', :method => :get do %>
  <i class="bookmark icon"></i> Bookmark
<% end %>

• Rails: Displaying a List of Favorites for the Logged-in User
• Rails: Applying Classes to form_for in Devise
• Fixing Headers in Rails
• How to Use jQuery and Semantic UI with Rails 5.1 Asset Pipeline
• Using Semantic UI Dropdowns in Rails