<%%= form_for :session, url: sessions_path do |f| %>
  <p>
    <%%= f.label :email %>
    <%%= f.text_field :email %>
  </p>
  <p>
    <%%= f.label :password %>
    <%%= f.password_field :password %>
  </p>
  <%%= submit_tag %>

  <%%= link_to("Forgot password?", forgot_password_path) %>
<%% end %>

<%%= form_for :session, url: sessions_path do |f| %>
  <p>
    <%%= f.label :email %>
    <%%= f.text_field :email %>
  </p>
  <p>
    <%%= f.label :password %>
    <%%= f.password_field :password %>
  </p>
  <%%= submit_tag 'Sign In' %>

  <%%= link_to("Forgot password?", forgot_password_path) %>
<%% end %>

Use descriptive label for sign in button
Use descriptive label for sign in button