More descriptive error message

[nus-pe-bot]

The error messages for incorrect input is very generic. It took me very long to find my error in this input. Especially since there are so many parameters for the command, a specific error message pointing at which part of the input is incorrect would be helpful and make the app more user friendly, especially for beginners.

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_{[original: nus-cs2113-AY1920S2/pe-interim#513]}

[jichngan]

Team's Response

Thank you for your insightful response. After much discussion, we agree that we could be more specific in our error messages. Thanks.

Duplicate status (if any):

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