[PE-D][Tester D] Does not catch missing description argument for edit command

[nus-pe-bot]

Steps to reproduce
Enter the following command in order:
expense Taxi /a 65 /c TRANSPORT
edit 1 /des

Expected Output
There should some kind of error message shown to the user to highlight that the edit command entered by the user has missing description after the /des flag.

Actual Output
However, a success message is shown, telling the user that the transaction at index 1 has been edited when no information has been given on how the transaction should be edited.

Screenshot

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Labels: severity.Medium type.FunctionalityBug
original: nirala-ts/ped#8