Correct a spelling error

[jacobherrington]

Summary

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.

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[gmcgibbon]

I prefer queueing but it seems we have more results for queuing (including file/class names), so I think this is the right approach. Can you please find replace the rest of the places in our docs where we use queueing instead of queuing?

Also, please use [ci skip] for documentation PRs. Thanks! 😄

[jacobherrington]

@gmcgibbon I made the change, but stuck to markdown files. There seems to be a few places that the queueing spelling is used both in comments and in a couple of errors in activejob.

Changing the comments doesn't seem like it would cause any problems, but the errors make me a bit nervous as some people might be referencing those in their own code.

How do you feel about me making those changes in comments and in the error messages?

Specifically:

rails/activejob/lib/active_job/queue_adapters/sneakers_adapter.rb

Line 33 in b2eb1d1

raise NotImplementedError, "This queueing backend does not support scheduling jobs. To see what features are supported go to http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html"

rails/activejob/lib/active_job/queue_adapters/inline_adapter.rb

Line 19 in 48c287d

raise NotImplementedError, "Use a queueing backend to enqueue jobs in the future. Read more at https://guides.rubyonrails.org/active_job_basics.html"

[gmcgibbon]

@jacobherrington You can change the comments without CI runs, but not error strings. Regardless, please squash your commits and I can merge what you have. Or, if you want to change the comments, I'll accept that too.

[jacobherrington]

@gmcgibbon Changes made. I'll make a separate PR for the error strings and discuss the merits of that change there (if there are any).

[gmcgibbon]

One last comment, otherwise looks good 👍

[gmcgibbon]

You missed one ref in railties/RDOC_MAIN.rdoc. You can include that in your next patch.