[REQUEST]Provide a way to change the choices separator when passing choices arg to Prompt.ask.

[vivekkeshore]

The default choices separator is "/", and there is no way to customise it.

Example

from rich.prompt import Prompt

predicate = Prompt.ask(
	f"[green]Enter the animal name[/green]",
	choices=["Lion", "Tiger", "Bear", "Giraffe", "Elephant"],
	case_sensitive=False,
	show_choices=True
)

Otutput

Enter the animal name [Lion/Tiger/Bear/Giraffe/Elephant]:

I would like to customise the separator, for example.

Enter the animal name [Lion, Tiger, Bear, Giraffe, Elephant]:

Or

Enter the animal name [Lion | Tiger | Bear | Giraffe | Elephant]:

[github-actions]

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[RafaelWO]

I would also like to change the choice separator 🙂 However, I need more customization for choices and thus I created a class deriving from PromptBase to override how the choices are created (among other things).

Currently, the choices are created within PromptBase.make_prompt() which creates the prompt including choices and default values. If you want to change the rendering of the choices, one needs to override the complete function.

Therefore, I propose extracting the choice logic into another function e.g. make_choices to improve the developer experience if you want to customize this. Regarding the separator, I could also imagine adding a class variable (similar to prompt_suffix) to allow users to customize it easily through a custom class - if for some reason you don't want a new option in the Prompt.ask function.

I am happy to add my changes to the already opened PR #3553 if maintainers agree 🙃