Update docs

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2579 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/lib/commands/perform.rb

@@ -1,5 +1,5 @@
 if %w( benchmarker profiler ).include?(ARGV.first)
   require "#{File.dirname(__FILE__)}/perform/#{ARGV.shift}"
 else
-  puts "Choose either benchmarker or profiler"
+  puts "Usage: ./script/perform [benchmarker|profiler]"
 end

railties/lib/commands/perform/benchmarker.rb

@@ -1,7 +1,7 @@
 #!/usr/local/bin/ruby
 
 if ARGV.empty?
-  puts "Usage: benchmarker times 'Person.expensive_way' 'Person.another_expensive_way' ..."
+  puts "Usage: ./script/perform benchmarker [times] 'Person.expensive_way' 'Person.another_expensive_way' ..."
   exit 
 end
 

railties/lib/commands/perform/profiler.rb

@@ -1,6 +1,6 @@
 #!/usr/local/bin/ruby
 if ARGV.empty?
-  $stderr.puts "Usage: profiler 'Person.expensive_method(10)' [times]"
+  $stderr.puts "Usage: ./script/perform profiler 'Person.expensive_method(10)' [times]"
   exit(1)
 end