(W4) Nikema and Mike (Check Input Values if there are Duplicates in Database)

7. As a user, I want to be alerted when I’m entering an item that is the same as something already on my list so I can avoid duplicate items #29

AC:

• 7.1 Show an error message if the user tries to submit a new item that has the exact same name as an existing item
• 7.2 Show an error message if the user tries to submit a new item that has the same name as an existing item, where capitalization has been normalized and punctuation has been removed
• 7.3 The user’s original input should be what gets saved in the database

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