Wrong response punctuation when no food in database

[nus-pe-bot]

The response still uses a ':' followed by nothing when there is no food in database.

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_{[original: nus-cs2113-AY1920S2/pe-interim#716]}

[lamyuewei]

Team's Response

Rejected as bug does not affect the usage of the product since it is still crystal clear to the user, what is or isn't stored in the database.

Duplicate status (if any):

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