applies new string literal convention in tools

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

tools/console

@@ -1,9 +1,9 @@
 #!/usr/bin/env ruby
-require 'bundler'
+require "bundler"
 Bundler.setup
 
-require 'rails/all'
-require 'active_support/all'
-require 'irb'
-require 'irb/completion'
+require "rails/all"
+require "active_support/all"
+require "irb"
+require "irb/completion"
 IRB.start

tools/profile

@@ -4,8 +4,8 @@
 #
 # Example:
 #   tools/profile activesupport/lib/active_support.rb [ruby-prof mode] [ruby-prof printer]
-ENV['NO_RELOAD'] ||= '1'
-ENV['RAILS_ENV'] ||= 'development'
+ENV["NO_RELOAD"] ||= "1"
+ENV["RAILS_ENV"] ||= "development"
 
 module CodeTools
   class Profiler
@@ -15,7 +15,7 @@ module CodeTools
     def initialize(path, mode=nil)
       assert_ruby_file_exists(path)
       @path, @mode = path, mode
-      require 'benchmark'
+      require "benchmark"
     end
 
     def profile_requires
@@ -23,7 +23,7 @@ module CodeTools
       before_rss = `ps -o rss= -p #{Process.pid}`.to_i
 
       if mode
-        require 'ruby-prof'
+        require "ruby-prof"
         RubyProf.measure_mode = RubyProf.const_get(mode.upcase)
         RubyProf.start
       else
@@ -43,13 +43,13 @@ module CodeTools
         elsif RubyProf.const_defined?(:CallStackPrinter)
           filename = "#{File.basename(path, '.rb')}.#{mode}.html"
           puts "RubyProf outputting to #{filename}"
-          File.open(filename, 'w') do |out|
+          File.open(filename, "w") do |out|
             RubyProf::CallStackPrinter.new(results).print(out)
           end
         else
           filename = "#{File.basename(path, '.rb')}.#{mode}.callgrind"
           puts "RubyProf outputting to #{filename}"
-          File.open(filename, 'w') do |out|
+          File.open(filename, "w") do |out|
             RubyProf::CallTreePrinter.new(results).print(out)
           end
         end
@@ -57,7 +57,7 @@ module CodeTools
 
       RequireProfiler.stats.each do |file, depth, sec|
         if sec
-          puts "%8.1f ms  %s%s" % [sec * 1000, ' ' * depth, file]
+          puts "%8.1f ms  %s%s" % [sec * 1000, " " * depth, file]
         else
           puts "#{' ' * (13 + depth)}#{file}"
         end
@@ -70,8 +70,8 @@ module CodeTools
     def assert_ruby_file_exists(path)
       fail Error.new("No such file") unless File.exist?(path)
       fail Error.new("#{path} is a directory") if File.directory?(path)
-      ruby_extension = File.extname(path) == '.rb'
-      ruby_executable = File.open(path, 'rb') {|f| f.readline } =~ [/\A#!.*ruby/]
+      ruby_extension = File.extname(path) == ".rb"
+      ruby_executable = File.open(path, "rb") {|f| f.readline } =~ [/\A#!.*ruby/]
       fail Error.new("Not a ruby file") unless ruby_extension or ruby_executable
     end
 
@@ -103,15 +103,15 @@ end
 #   which is probably overkill if you already know the name of the ruby-prof
 #   printer you want to use, e.g. Graph
 begin
-  require 'active_support/inflector'
-  require 'active_support/core_ext/string/inflections'
+  require "active_support/inflector"
+  require "active_support/core_ext/string/inflections"
 rescue LoadError
   STDERR.puts $!.message
   class String
     # File activesupport/lib/active_support/inflector/methods.rb, line 150
     def classify
       # strip out any leading schema name
-      camelize(self.sub(/.*\./, ''))
+      camelize(self.sub(/.*\./, ""))
     end
     # File activesupport/lib/active_support/inflector/methods.rb, line 68
     def camelize(uppercase_first_letter = true)
@@ -121,7 +121,7 @@ rescue LoadError
       else
         string = string.sub(/^(?:(?=\b|[A-Z_])|\w)/) { |match| match.downcase }
       end
-      string.gsub(/(?:_|(\/))([a-z\d]*)/) { "#{$1}#{$2.capitalize}" }.gsub('/', '::')
+      string.gsub(/(?:_|(\/))([a-z\d]*)/) { "#{$1}#{$2.capitalize}" }.gsub("/", "::")
     end
   end
 end

tools/test.rb

@@ -1,6 +1,6 @@
 $: << File.expand_path("test", COMPONENT_ROOT)
 
-require 'bundler'
+require "bundler"
 Bundler.setup
 
 require "rails/test_unit/minitest_plugin"