Wrong Error Message for Filter

[ananya21]

Description:

filter-none returns unknown-command, instead of invalid priority level

Steps to Reproduce:

1. Enter the following command "filter-none"
2. Hit Enter

Expected Behaviour: Error Message: None is not a valid priority level, please try again

Actual Behaviour: Error Message: Unknown Command

Screenshot/Video:

Other Comments:

• Assigned low because the user can read the user guide to find out none is an invalid priority level
• The user can become confused though and assume the filter-[PRIORITY-LEVEL] command doesn't work

[nus-pe-bot]

Team's Response

It is stated in the UG that filtering by none is not an option. In addition, this does not affect usability.

Items for the Tester to Verify

:question: Issue response

Team chose [response.Rejected]

• [x] I disagree

Reason for disagreement: I still think this is a valid bug, the program should return a different error message in this case

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## :question: Issue severity Team chose [`severity.VeryLow`] Originally [`severity.Low`] - [ ] I disagree **Reason for disagreement:** [replace this with your explanation]

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