<% if user_logged_in? %>

  <%= form_tag(favorite_stories_path( story.id ), method: :get, value: "true", class: 'inline') do %>
    <%= submit_tag ' | Save', class: 'save_button' %>
  <% end %>

<% end %>

<% if user_logged_in? %>
  <% if story.favorited == "true" %>
    <%= form_tag(favorite_stories_path( story.id ), method: :get, value: "false", class: 'inline') do %>
      <%= submit_tag ' | Unsave', class: 'save_button' %>
    <% end %>
  <% else %>
    <%= form_tag(favorite_stories_path( story.id ), method: :get, value: "true", class: 'inline') do %>
      <%= submit_tag ' | Save', class: 'save_button' %>
    <% end %>
  <% end %>
<% end %>

Add 'unsave' button to 'save', tweak variables
Add 'unsave' button to 'save', tweak variables
