<div id='content'>
  <div class='left column'>
    <h2>Welcome to our site!</h2>
    <p><%= print_information %></p>
  </div>
  <div class="right column">
    <%= render :partial => "sidebar" %>
  </div>
</div>

HAML

#content
  .left.column
    %h2 Welcome to our site!
    %p= print_information
  .right.column
    = render :partial => "sidebar"

ERB

<%# Non-printing tag ↓ -%>
<% if @keys_enable -%>
<%# Expression-printing tag ↓ -%>
keys <%= @keys_file %>
<% unless @keys_trusted.empty? -%>
trustedkey <%= @keys_trusted.join(' ') %>
<% end -%>
<% if @keys_requestkey != '' -%>
requestkey <%= @keys_requestkey %>
<% end -%>
<% if @keys_controlkey != '' -%>
controlkey <%= @keys_controlkey %>
<% end -%>

<% end -%>