```ruby
require 'rubygems'
require 'bundler/setup'

Bundler.require(:default)

# The project root directory
root = ::File.dirname(__FILE__)

# Code highlighting
require 'pygments'
require 'rack/codehighlighter'
if ENV['HOME'] == '/app'
  # If running on Heroku...
  require 'rubypython'
  RubyPython.start(:python_exe => "python2.6")
end
use Rack::Codehighlighter, :pygments, :element => "pre>code", :markdown => true

# Cache control headers for Heroku
require 'rack/contrib'
use Rack::ResponseHeaders do |headers|
  headers['Cache-Control'] = 'public, max-age=1501'
end
use Rack::ETag

# Google analytics
require "rack/google_analytics"
use Rack::GoogleAnalytics, web_property_id: "UA-4556641-15"

# URL rewriting
require 'rack/rewrite'
use Rack::Rewrite do
  # Articles -> Editorial
  r301 %r{^/articles(?!\.xml)(.*)$}, '/editorial$1'
end

run Middleman.server
```

Remove and 301 redirect trailing slashes in URLs
user
```ruby
require 'rubygems'
require 'bundler/setup'

Bundler.require(:default)

# The project root directory
root = ::File.dirname(__FILE__)

# Code highlighting
require 'pygments'
require 'rack/codehighlighter'
if ENV['HOME'] == '/app'
  # If running on Heroku...
  require 'rubypython'
  RubyPython.start(:python_exe => "python2.6")
end
use Rack::Codehighlighter, :pygments, :element => "pre>code", :markdown => true

# Cache control headers for Heroku
require 'rack/contrib'
use Rack::ResponseHeaders do |headers|
  headers['Cache-Control'] = 'public, max-age=1501'
end
use Rack::ETag

# Google analytics
require "rack/google_analytics"
use Rack::GoogleAnalytics, web_property_id: "UA-4556641-15"

# URL rewriting
require 'rack/rewrite'
use Rack::Rewrite do
  # Articles -> Editorial
  r301 %r{^/articles(?!\.xml)(.*)$}, '/editorial$1'
  # Remove and 301 redirect trailing slashes in URLs
  r301 %r{^/(.*)/$}, '/$1'
end

run Middleman.server
```
assistant