Cannot choose "yes" for satisification of a generated gift

[nus-se-script]

When attempting to choose "yes" when prompted if the user is satisfied with the generated gift through the gift command, the app crashes.

Steps to replicate:

1. Type in any gift commands
2. Upon prompting, type yes

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_{[original: nus-cs2113-AY2324S2/pe-interim#1774] [original labels: type.FunctionalityBug severity.Medium]}

[liuy1103]

Team's Response

By right upon entering any gift commands, the gift suggested should not be null as shown in the screenshot as this issue was raised before and has been adequately addressed in v2.1 release. Require more information on how the tester run the application and actions afterwards. App naturally crashes if users try to accept a null (empty) suggestion. The following output should be what users should receive if they have not exhaust all the gifts in the given gender category:

The following output is what users should see if they respond no and exhausted all suggestions for the given gender category:

User can try copying the JAR file to another directory and run again. When trying, use java -jar "[CS2113-T11-2][Flirt_and_Fork].jar" to ensure that it is properly initiated. Also, check that the GiftList.txt file is present in the data folder upon running for the first time. DO NOT make changes to the data files as this may result in unintended consequences.

Duplicate status (if any):

Duplicate of #1489