Ruby 1.9.3+-only cleanups

unicorn 5 will only support Ruby 1.9.3 and later, so remove
some checks for Hash#compare_by_identity and IO.copy_stream
which we know exist in Ruby 1.9.

Favor &:sym proc dispatch to avoid unnecessary captures and
bytecode size increases, too.

Finally, ensure we fail fast by converting some literal
hashes to use non-arrow syntax for symbolic keys.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/rainbows/writer_thread_pool.rb b/lib/rainbows/writer_thread_pool.rb
index b5688e0..657d076 100644
--- a/lib/rainbows/writer_thread_pool.rb
+++ b/lib/rainbows/writer_thread_pool.rb
@@ -50,9 +50,9 @@ module Rainbows::WriterThreadPool
       end
     end
 
-    @@q = qp.map { |q| q.queue }
+    @@q = qp.map(&:queue)
     super(worker) # accept loop from Unicorn
-    qp.each { |q| q.quit! }
+    qp.each(&:quit!)
   end
   # :startdoc:
 end