Add notes on how to exit the debugger [ci-skip]

[siaw23]

Summary

A short note on how to quit the debugger. Fumbled a bit trying to leave the debugger.

Other Information

[jonathanhefner]

I think mentioning these commands is a good addition! 👍

[jonathanhefner]

I agree that in most cases the user will want to continue, so let's mention that first:

Suggested change

	You can leave a debugging session with `quit` or `q` and confirm your action at the prompt or with `quit!` and its alias `q!` to bypass the prompt. In most cases though, you'd want to continue program execution with `continue` or `c`.
	You can exit the debugging session at any time and continue your application execution with the `continue` (or `c`) command. Or, to exit both the debugging session and your application, use the `quit` (or `q`) command.

I added "at any time" because we've just introduced the debugging session, and we don't want to exit it just yet, based on the next section of the guide. (I also left out the quit! / q! command for brevity.)

[siaw23]

This definitely better. Thanks ;)

[simi]

🤔 Wouldn't be better to just replace this complex debugging section with simple example of just using binding.irb? That way you get the same console you know from irb or bin/rails c and that one should be familiar. For more advanced debugging we can just link to https://github.com/ruby/debug (latest ruby debugger).

[siaw23]

🤔 Wouldn't be better to just replace this complex debugging section with simple example of just using binding.irb? That way you get the same console you know from irb or bin/rails c and that one should be familiar. For more advanced debugging we can just link to https://github.com/ruby/debug (latest ruby debugger).

There's a whole section on debugging with the debug gem in the docs. Personally I feel properly documenting its usage is necessary, Rails adds the debug gem by default to the Gemfile.

[jonathanhefner]

@simi This section of the guide was recently added in #43621, with popular support. Speaking personally, I like the idea of leaning more on external documentation (== less maintenance burden for us), but such a change would need to be a clear improvement over what we have now, particularly in the context of debugging a Rails application. If you have clear improvements in mind, please submit a PR! 🙏

In the mean time, I think this is a helpful addition. Thank you, @siaw23! 👋

(Backported to 7-0-stable.)

[simi]

@jonathanhefner In the end this rails guide seems like a good candidate to be ported to debug gem docs actually. Maybe one small section how to use simple binding.irb could be handy in here as well. I'll open PR once I'll get it together.