Inconsistent messages for invalid indexes

[cashewnade]

I've added three items to the addressbook. The command "delete 0" returns an invalid command error.

Whereas the command "delete 4" returns an invalid index error.

Since both are the same command and using invalid indexes, the error message displayed should be the same as well.

[soc-se-bot]

Team's Response

Rejected because bug type is specified wrongly. It should be feature flaw.

Items for the Tester to Verify

:question: Issue response

Team chose [response.Rejected]

• [x] I disagree

Reason for disagreement: If the team accepts it as a feature flaw, the team should've accepted this bug as a feature flaw instead of rejecting it.

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