Log Message:
Importing ruby193-base version 1.9.3p0 (Ruby 1.9.3 p0):

Please refer detail for:
	http://svn.ruby-lang.org/repos/ruby/tags/v1_9_3_0/NEWS
	http://svn.ruby-lang.org/repos/ruby/tags/v1_9_3_0/ChangeLog

Short summary from NEWS:

* Ruby's License is changed from a dual license with GPLv2
  to a dual license with 2-clause BSDL.

* Encoding
  * new encodings: CP950, CP951, UTF-16 and UTF-32
  * change alias:
    * SJIS is Windows-31J

* Regexps now support Unicode 6.0. (new characters and scripts)

* builtin classes

  * ARGF
    * new methods: ARGF.read_nonblock and so on.
  * Array
    * extended method: Array#pack supports endian modifiers
  * String
    * extended method: String#unpack supports endian modifiers
    * new method: String#prepend and String#byteslice
  * Bignum
    * Multiplication algorithm for Bignums with a large number of digits over
      150 BDIGITs is changed in order to reduce its calculation time.
      Now such large Bignums are multiplied by using Toom-3 algorithm.
  * File
    * new constant: File::NULL and File::DIRECT
  * IO
    * extended method: IO#putc supports multibyte characters
    * new methods: * IO#advise, IO.write and IO.binwrite
  * Kernel
    * move #__id__ to BasicObject
    * extended method: Kernel#rand supports range argument
  * Module
    * new methods: Module#private_constant and Module#public_constant
  * Random
    * extended method: Random.rand supports range argument
  * Time
    * extended method: Time#strftime supports %:z and %::z
  * Process
    * Process#maxgroups and Process#maxgroups= now raise NotImplementedError if
      the platform don't support supplementary groups concept