lib/sinatra/main.rb in sinatra-1.3.6 vs lib/sinatra/main.rb in sinatra-1.4.0.a

@@ -12,17 +12,19 @@
 
     if run? && ARGV.any?
       require 'optparse'
       OptionParser.new { |op|
         op.on('-p port',   'set the port (default is 4567)')                { |val| set :port, Integer(val) }
-        op.on('-o addr',   'set the host (default is 0.0.0.0)')             { |val| set :bind, val }
+        op.on('-o addr',   "set the host (default is #{bind})")             { |val| set :bind, val }
         op.on('-e env',    'set the environment (default is development)')  { |val| set :environment, val.to_sym }
         op.on('-s server', 'specify rack server/handler (default is thin)') { |val| set :server, val }
         op.on('-x',        'turn on the mutex lock (default is off)')       {       set :lock, true }
       }.parse!(ARGV.dup)
     end
   end
 
   at_exit { Application.run! if $!.nil? && Application.run? }
 end
 
-include Sinatra::Delegator
+# include would include the module in Object
+# extend only extends the `main` object
+extend Sinatra::Delegator