app/views/topics/_informative_text.html.erb
<p class="lead"><%= t("community.show.create_first_community_topic.first_theme") %></p>
<% if user_signed_in? %>
<div class="callout primary">
<%= t("community.show.create_first_community_topic.first_theme_not_logged_in") %>
</div>
<% else %>
<div class="callout primary">
<%= sanitize(t("community.show.create_first_community_topic.sub_first_theme",
sign_in: link_to_signin,
sign_up: link_to_signup)) %>
</div>
<% end %>