Change queueing to queuing in docs and comments [skip ci]

My spellchecker flagged this as an incorrect spelling, upon further
research it appears to be a point of contention in English. Either way
might work.

After further examination queuing is much more common in the Rails
codebase so making this change will serve to standardize the spelling.

README.md

@@ -45,7 +45,7 @@ or to generate the body of an email. In Rails, View generation is handled by [Ac
 [Active Record](activerecord/README.rdoc), [Active Model](activemodel/README.rdoc), [Action Pack](actionpack/README.rdoc), and [Action View](actionview/README.rdoc) can each be used independently outside Rails.
 In addition to that, Rails also comes with [Action Mailer](actionmailer/README.rdoc), a library
 to generate and send emails; [Active Job](activejob/README.md), a
-framework for declaring jobs and making them run on a variety of queueing
+framework for declaring jobs and making them run on a variety of queuing
 backends; [Action Cable](actioncable/README.md), a framework to
 integrate WebSockets with a Rails application; [Active Storage](activestorage/README.md), a library to attach cloud
 and local files to Rails applications;

activejob/README.md

@@ -1,7 +1,7 @@
 # Active Job -- Make work happen later
 
 Active Job is a framework for declaring jobs and making them run on a variety
-of queueing backends. These jobs can be everything from regularly scheduled
+of queuing backends. These jobs can be everything from regularly scheduled
 clean-ups, to billing charges, to mailings. Anything that can be chopped up into
 small units of work and run in parallel, really.
 
@@ -20,7 +20,7 @@ switch between them without having to rewrite your jobs.
 
 ## Usage
 
-To learn how to use your preferred queueing backend see its adapter
+To learn how to use your preferred queuing backend see its adapter
 documentation at
 [ActiveJob::QueueAdapters](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
@@ -39,7 +39,7 @@ end
 Enqueue a job like so:
 
 ```ruby
-MyJob.perform_later record  # Enqueue a job to be performed as soon as the queueing system is free.
+MyJob.perform_later record  # Enqueue a job to be performed as soon as the queuing system is free.
 ```
 
 ```ruby
@@ -82,9 +82,9 @@ This works with any class that mixes in GlobalID::Identification, which
 by default has been mixed into Active Record classes.
 
 
-## Supported queueing systems
+## Supported queuing systems
 
-Active Job has built-in adapters for multiple queueing backends (Sidekiq,
+Active Job has built-in adapters for multiple queuing backends (Sidekiq,
 Resque, Delayed Job and others). To get an up-to-date list of the adapters
 see the API Documentation for [ActiveJob::QueueAdapters](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 

activejob/activejob.gemspec

@@ -7,7 +7,7 @@
   s.name        = "activejob"
   s.version     = version
   s.summary     = "Job framework with pluggable queues."
-  s.description = "Declare job classes that can be run by a variety of queueing backends."
+  s.description = "Declare job classes that can be run by a variety of queuing backends."
 
   s.required_ruby_version = ">= 2.4.1"
 

activejob/lib/active_job/base.rb

@@ -40,7 +40,7 @@ module ActiveJob #:nodoc:
   # Records that are passed in are serialized/deserialized using Global
   # ID. More information can be found in Arguments.
   #
-  # To enqueue a job to be performed as soon as the queueing system is free:
+  # To enqueue a job to be performed as soon as the queuing system is free:
   #
   #   ProcessPhotoJob.perform_later(photo)
   #

activejob/lib/active_job/callbacks.rb

@@ -130,7 +130,7 @@ def after_enqueue(*filters, &blk)
         set_callback(:enqueue, :after, *filters, &blk)
       end
 
-      # Defines a callback that will get called around the enqueueing
+      # Defines a callback that will get called around the enqueuing
       # of the job.
       #
       #   class VideoProcessJob < ActiveJob::Base

activejob/lib/active_job/core.rb

@@ -78,7 +78,7 @@ def initialize(*arguments)
     end
 
     # Returns a hash with the job data that can safely be passed to the
-    # queueing adapter.
+    # queuing adapter.
     def serialize
       {
         "job_class"  => self.class.name,

activejob/lib/active_job/execution.rb

@@ -26,7 +26,7 @@ def execute(job_data) #:nodoc:
       end
     end
 
-    # Performs the job immediately. The job is not sent to the queueing adapter
+    # Performs the job immediately. The job is not sent to the queuing adapter
     # but directly executed by blocking the execution of others until it's finished.
     #
     #   MyJob.new(*args).perform_now

activejob/lib/active_job/queue_adapters.rb

@@ -3,7 +3,7 @@
 module ActiveJob
   # == Active Job adapters
   #
-  # Active Job has adapters for the following queueing backends:
+  # Active Job has adapters for the following queuing backends:
   #
   # * {Backburner}[https://github.com/nesquena/backburner]
   # * {Delayed Job}[https://github.com/collectiveidea/delayed_job]
@@ -52,7 +52,7 @@ module ActiveJob
   #
   # No: The adapter will run jobs at the next opportunity and cannot use perform_later.
   #
-  # N/A: The adapter does not support queueing.
+  # N/A: The adapter does not support queuing.
   #
   # NOTE:
   # queue_classic supports job scheduling since version 3.1.
@@ -74,7 +74,7 @@ module ActiveJob
   #
   # No: Does not allow the priority of jobs to be configured.
   #
-  # N/A: The adapter does not support queueing, and therefore sorting them.
+  # N/A: The adapter does not support queuing, and therefore sorting them.
   #
   # ==== Timeout
   #

guides/source/configuring.md

@@ -731,7 +731,7 @@ There are a few configuration options available in Active Support:
 
 `config.active_job` provides the following configuration options:
 
-* `config.active_job.queue_adapter` sets the adapter for the queueing backend. The default adapter is `:async`. For an up-to-date list of built-in adapters see the [ActiveJob::QueueAdapters API documentation](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
+* `config.active_job.queue_adapter` sets the adapter for the queuing backend. The default adapter is `:async`. For an up-to-date list of built-in adapters see the [ActiveJob::QueueAdapters API documentation](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
     ```ruby
     # Be sure to have the adapter's gem in your Gemfile