spaceless.rb

module ApplicationHelper
 
  def spaceless(&block)
    contents = capture(&block)
 
    # Note that string returned by +capture+ is implicitly HTML-safe,
    # and this mangling does not introduce unsafe changes, so I'm just
    # resetting the flag.
    if Rails.env.production? then
      contents.strip.gsub(/>\s+</, '><').html_safe
    else
      contents.html_safe
    end
  end
 
end
 
 
# In view:
<%= spaceless do %>
<!-- ........ -->
<% end %>