Better errror message for lists in config file

[stsewd]

After #4740 is merged, we will show the error message for lists as list.{index}, which isn't so clear, we should use list[{index}] instead.

Raised in #4740 (comment)

[dojutsu-user]

@stsewd
Can I take this issue?

[stsewd]

No yet, it depends on #4740, in we should think in a way of resolve this #4740 (comment)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stsewd]

This isn't blocker anymore, but we still need to figure out a clean way of implementing this.

And I'm not really sure adding that logic is worth it, we should just keep the current message.

[humitos]

we still need to figure out a clean way of implementing this.

This will take care the person that implements it.

I'm removing the Design decision label and marking it as Accepted.

And I'm not really sure adding that logic is worth it, we should just keep the current message.

We can decide that when we see the changes in the PR propsed.