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# -*- rdoc -*-

= NEWS for Ruby 2.1.0

This document is a list of user visible feature changes made between
releases except for bug fixes.

Note that each entry is kept so brief that no reason behind or
reference information is supplied with.  For a full list of changes
with all sufficient information, see the ChangeLog file.

== Changes since the 2.0.0 release

=== Language changes
=== Core classes updates (outstanding ones only)

* GC
  * added environment variable:
    * RUBY_HEAP_SLOTS_GROWTH_FACTOR: growth rate of the heap.

* IO
  * extended methods:
    * IO#seek accepts symbols (:CUR, :END, :SET) for 2nd argument.

* Mutex
  * misc
    * Mutex#owned? is no longer experimental.

* pack/unpack (Array/String)
  * Q! and q! directives for long long type if platform has the type.

=== Core classes compatibility issues (excluding feature bug fixes)

* Module#ancestors

  The ancestors of a singleton class now include singleton classes,
  in particular itself.

=== Stdlib updates (outstanding ones only)

* Net::SMTP
  * Added Net::SMTP#rset to implement the RSET command

* Pathname
  * New methods:
    * Pathname#write
    * Pathname#binwrite

* open-uri
  * Support multiple fields with same field name (like Set-Cookie).

* Resolv
  * New methods:
    * Resolv::DNS.fetch_resource
  * One-shot multicast DNS support
  * Support LOC resources

* Rinda::RingServer, Rinda::RingFinger
  * Rinda now supports multicast sockets.  See Rinda::RingServer and
    Rinda::RingFinger for details.

=== Stdlib compatibility issues (excluding feature bug fixes)
=== C API updates