Rename for clarity

Author: eregon

lib/timeout.rb

@@ -95,7 +95,7 @@ def finished
   end
   private_constant :Request
 
-  def self.ensure_timer_thread_created
+  def self.ensure_timeout_thread_created
     unless @timeout_thread
       TIMEOUT_THREAD_MUTEX.synchronize do
         @timeout_thread ||= Thread.new do
@@ -159,7 +159,7 @@ def timeout(sec, klass = nil, message = nil, &block)   #:yield: +sec+
       return scheduler.timeout_after(sec, klass || Error, message, &block)
     end
 
-    Timeout.ensure_timer_thread_created
+    Timeout.ensure_timeout_thread_created
     perform = Proc.new do |exc|
       request = Request.new(Thread.current, sec, exc, message)
       QUEUE_MUTEX.synchronize do