Revert "This conditions is required to work with database create task.

remove conditions for GC::Profiler in ruby19

Revert "This conditions is required to work with database create task. 1.9.2 is having a bug with "Calling return within begin still executes else". "

No need to worry about 1.9.2 with master
This reverts commit fbf4bee6.

Removed RUBY_ENGINE checks for ruby18

GC::Profiler available in ruby19

refactor Range#include? for range value

remove ForClassicTestUnit support for ruby 1.8 in performance and setup and teardown

remove rexml security fix for rubies 1.8

 change Log

This reverts commit 76f0fa60, reversing
changes made to 28cd098d.

a prompt string in include_blank option for date helpers

If you used dynamic constraint like that:

  scope :constraint => MyConstraint.new do
    mount RackApp => "/foo"
  end

routes were not displayed correctly when using `rake routes`.
This commit fixes it. If you want nice display of dynamic
constraints in `rake routes` output, please just override
to_s method in your constraint's class.

remove File#to_path alias

Test::Unit::Util::BacktraceFilter not available in ruby19 test/unit

AS::Callbacks: improved __define_runner performance

::BasicObject always defined in ruby 19

ruby 1.9 returns method names as symbols

Module#name returns nil for anonymous class in ruby 1.9

remove date methods that are present in 1.9 ruby

remove useless 1.8 ruby code from Range#step

AS::Callbacks: improve __define_runner perfomance for non-keyed callbacks.

remove useless 1.8 ruby code from Range#step, because Range#step without block always returns enumerator